Q: Is 400,071 a Prime Number?

A: No, 400,071 is not a prime number.

Why is 400,071 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 400071 can be evenly divided by 1 3 7 21 19,051 57,153 133,357 and 400,071, with no remainder.

Since 400,071 cannot be divided by just 1 and 400,071, it is not a prime number.

Number	400,069	400,070	400,072	400,073
Prime?	yes	no	no	no

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

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