Q: Is 645,419 a Prime Number?
A: Yes, 645,419 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 645419 can be evenly divided by 1 and 645,419, with no remainder.
Since 645,419 can be divided by just 1 and 645,419, it is a prime number.