Q: Is 505,491 a Prime Number?
A: No, 505,491 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 505491 can be evenly divided by 1 3 7 21 24,071 72,213 168,497 and 505,491, with no remainder.
Since 505,491 cannot be divided by just 1 and 505,491, it is not a prime number.