Q: Is 645,845 a Prime Number?
A: No, 645,845 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 645845 can be evenly divided by 1 5 129,169 and 645,845, with no remainder.
Since 645,845 cannot be divided by just 1 and 645,845, it is not a prime number.