Q: Is 315,405 a Prime Number?
A: No, 315,405 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 315405 can be evenly divided by 1 3 5 9 15 43 45 129 163 215 387 489 645 815 1,467 1,935 2,445 7,009 7,335 21,027 35,045 63,081 105,135 and 315,405, with no remainder.
Since 315,405 cannot be divided by just 1 and 315,405, it is not a prime number.