Q: Is 400,201 a Prime Number?

A: No, 400,201 is not a prime number.

Why is 400,201 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 400201 can be evenly divided by 1 41 43 227 1,763 9,307 9,761 and 400,201, with no remainder.

Since 400,201 cannot be divided by just 1 and 400,201, it is not a prime number.

Number	400,199	400,200	400,202	400,203
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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