Q: Is 642,748 a Prime Number?
A: No, 642,748 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 642748 can be evenly divided by 1 2 4 160,687 321,374 and 642,748, with no remainder.
Since 642,748 cannot be divided by just 1 and 642,748, it is not a prime number.