Q: Is 121,665 a Prime Number?
A: No, 121,665 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 121665 can be evenly divided by 1 3 5 15 8,111 24,333 40,555 and 121,665, with no remainder.
Since 121,665 cannot be divided by just 1 and 121,665, it is not a prime number.