Q: Is 135,405 a Prime Number?
A: No, 135,405 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 135405 can be evenly divided by 1 3 5 9 15 17 27 45 51 59 85 135 153 177 255 295 459 531 765 885 1,003 1,593 2,295 2,655 3,009 5,015 7,965 9,027 15,045 27,081 45,135 and 135,405, with no remainder.
Since 135,405 cannot be divided by just 1 and 135,405, it is not a prime number.