Q: Is 121,558 a Prime Number?
A: No, 121,558 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 121558 can be evenly divided by 1 2 60,779 and 121,558, with no remainder.
Since 121,558 cannot be divided by just 1 and 121,558, it is not a prime number.