Q: Is 321,745 a Prime Number?

A: No, 321,745 is not a prime number.

Why is 321,745 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 321745 can be evenly divided by 1 5 229 281 1,145 1,405 64,349 and 321,745, with no remainder.

Since 321,745 cannot be divided by just 1 and 321,745, it is not a prime number.

Number	321,743	321,744	321,746	321,747
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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