Q: Is 642,397 a Prime Number?
A: No, 642,397 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 642397 can be evenly divided by 1 7 91,771 and 642,397, with no remainder.
Since 642,397 cannot be divided by just 1 and 642,397, it is not a prime number.