Q: Is 509,945 a Prime Number?
A: No, 509,945 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 509945 can be evenly divided by 1 5 79 395 1,291 6,455 101,989 and 509,945, with no remainder.
Since 509,945 cannot be divided by just 1 and 509,945, it is not a prime number.