Q: Is 642,508 a Prime Number?
A: No, 642,508 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 642508 can be evenly divided by 1 2 4 160,627 321,254 and 642,508, with no remainder.
Since 642,508 cannot be divided by just 1 and 642,508, it is not a prime number.