En million er mye.

Because million is a common-gender noun in Norwegian, and common-gender nouns take en in the indefinite singular.

• en million = a million
• millionen = the million

If it were a neuter noun, it would take ett, but million is not neuter.

Here, million is a noun. It works just like English million in a million is a lot.

It is singular in this sentence:

• en million = a million

The plural is:

• millioner = millions

Example:

• To millioner er mye. = Two million is a lot / Two million are a lot, depending on context in English.

Norwegian often leaves out the thing being counted if it is understood from context.

So En million er mye could mean things like:

• A million kroner is a lot
• A million dollars is a lot
• A million people is a lot

If you want to be more specific, you can add the noun:

• En million kroner er mye.

Er is the present tense of å være (to be).

So:

• en million = subject
• er = is
• mye = complement

This is a very basic Norwegian sentence pattern:

subject + verb + complement

Example:

• Det er sant. = It is true.
• En million er mye. = A million is a lot.

Here, mye means much, a lot, or a large amount.

In this sentence, it describes the quantity as large:

• En million er mye. = A million is a lot.

It does not mean many here. It is about the idea of a large amount, not directly modifying a countable noun.

This is a very common question.

• mye is used for amount or something seen as a whole quantity
• mange is used directly with countable plural nouns

So:

• En million er mye. = correct
• En million mennesker er mange. = A million people is many / are many
  (more natural in English: A million people is a lot)

You would use mange if you actually name plural countable things:

• mange bøker = many books
• mange mennesker = many people

But in En million er mye, the speaker is judging the amount itself, so mye is the right word.

It behaves in an adjective-like way here, but learners often find it easiest to think of it as a quantifier/adverbial word meaning a lot or much.

In En million er mye, it is used predicatively, after er, to say that the amount is large.

Compare:

• Det er mye mat. = There is a lot of food.
• En million er mye. = A million is a lot.

So you do not need to treat it exactly like a normal descriptive adjective such as stor or fin.

Yes, it is natural, especially when the context makes clear what kind of million you mean.

For example, if people are talking about money, En million er mye sounds perfectly normal.

If you want to sound more explicit, you could say:

• En million kroner er mye.
• En million dollar er mye.

But the short version is very common when the meaning is obvious from the situation.

The word order is completely standard:

En million + er + mye
subject + verb + complement

This is the same basic pattern as in many simple Norwegian statements.

Examples:

• Han er trøtt. = He is tired.
• Dette er viktig. = This is important.
• En million er mye. = A million is a lot.

A simple learner-friendly approximation is:

enn mill-YOON ehr MYY-eh

A few notes:

• million is pronounced roughly mill-YOON
• er is often pronounced very lightly in everyday speech
• mye is roughly MYY-eh, with two syllables

Pronunciation varies somewhat by dialect, but that approximation will be understandable.

Here are some useful related forms:

• en million = a million
• millionen = the million
• millioner = millions
• millionene = the millions

Examples:

• Millionen er brukt opp. = The million has been used up.
• To millioner er mye. = Two million is a lot.
• Mange millioner er brukt på prosjektet. = Many millions have been spent on the project.

So the sentence uses the indefinite singular form: en million.

Yes. That is perfectly natural.

• En million er mye. = A million is a lot.
• En million er veldig mye. = A million is very much / really a lot

You can also intensify it in other ways:

• En million er ganske mye. = A million is quite a lot
• En million er altfor mye. = A million is far too much

So the original sentence is simple and neutral, but it can easily be expanded.