Q: Is 4,005 a Prime Number?

A: No, 4,005 is not a prime number.

Why is 4,005 not a prime number?

A prime number is a natural number, greater than one, that can only be divided by 1 and itself.

The number 4005 can be evenly divided by 1 3 5 9 15 45 89 267 445 801 1,335 and 4,005, with no remainder.

Since 4,005 cannot be divided by just 1 and 4,005, it is not a prime number.

Number	4,003	4,004	4,006	4,007
Prime?	yes	no	no	yes

All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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