Q: Is 321,872 a Prime Number?

A: No, 321,872 is not a prime number.

Why is 321,872 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 321872 can be evenly divided by 1 2 4 8 16 20,117 40,234 80,468 160,936 and 321,872, with no remainder.

Since 321,872 cannot be divided by just 1 and 321,872, it is not a prime number.

Number	321,870	321,871	321,873	321,874
Prime?	no	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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