Q: Is 78,421 a Prime Number?

A: No, 78,421 is not a prime number.

Why is 78,421 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 78421 can be evenly divided by 1 7 17 119 659 4,613 11,203 and 78,421, with no remainder.

Since 78,421 cannot be divided by just 1 and 78,421, it is not a prime number.

Number	78,419	78,420	78,422	78,423
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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