Q: Is 4,221 a Prime Number?

A: No, 4,221 is not a prime number.

Why is 4,221 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 4221 can be evenly divided by 1 3 7 9 21 63 67 201 469 603 1,407 and 4,221, with no remainder.

Since 4,221 cannot be divided by just 1 and 4,221, it is not a prime number.

Number	4,219	4,220	4,222	4,223
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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