Q: Is 121,409 a Prime Number?
A: No, 121,409 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 121409 can be evenly divided by 1 167 727 and 121,409, with no remainder.
Since 121,409 cannot be divided by just 1 and 121,409, it is not a prime number.