Q: Is 428,642 a Prime Number?
A: No, 428,642 is 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 428642 can be evenly divided by 1 2 107 214 2,003 4,006 214,321 and 428,642, with no remainder.
Since 428,642 cannot be divided by just 1 and 428,642, it is not a prime number.