Q: Is 420,509 a Prime Number?
A: No, 420,509 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 420509 can be evenly divided by 1 23 47 389 1,081 8,947 18,283 and 420,509, with no remainder.
Since 420,509 cannot be divided by just 1 and 420,509, it is not a prime number.