Q: Is 428,673 a Prime Number?

A: No, 428,673 is not a prime number.

Why is 428,673 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 428673 can be evenly divided by 1 3 7 21 137 149 411 447 959 1,043 2,877 3,129 20,413 61,239 142,891 and 428,673, with no remainder.

Since 428,673 cannot be divided by just 1 and 428,673, it is not a prime number.

Number	428,671	428,672	428,674	428,675
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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