Q: Is 518,561 a Prime Number?
A: No, 518,561 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 518561 can be evenly divided by 1 61 8,501 and 518,561, with no remainder.
Since 518,561 cannot be divided by just 1 and 518,561, it is not a prime number.