Q: Is 121,815 a Prime Number?
A: No, 121,815 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 121815 can be evenly divided by 1 3 5 9 15 45 2,707 8,121 13,535 24,363 40,605 and 121,815, with no remainder.
Since 121,815 cannot be divided by just 1 and 121,815, it is not a prime number.