Q: Is 428,021 a Prime Number?

A: No, 428,021 is not a prime number.

Why is 428,021 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 428021 can be evenly divided by 1 11 167 233 1,837 2,563 38,911 and 428,021, with no remainder.

Since 428,021 cannot be divided by just 1 and 428,021, it is not a prime number.

Number	428,019	428,020	428,022	428,023
Prime?	no	no	no	yes

All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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