Q: Is 642,745 a Prime Number?
A: No, 642,745 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 642745 can be evenly divided by 1 5 128,549 and 642,745, with no remainder.
Since 642,745 cannot be divided by just 1 and 642,745, it is not a prime number.