Q: Is 645,049 a Prime Number?
A: Yes, 645,049 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 645049 can be evenly divided by 1 and 645,049, with no remainder.
Since 645,049 can be divided by just 1 and 645,049, it is a prime number.