Q: Is 421,185 a Prime Number?
A: No, 421,185 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 421185 can be evenly divided by 1 3 5 15 43 129 215 645 653 1,959 3,265 9,795 28,079 84,237 140,395 and 421,185, with no remainder.
Since 421,185 cannot be divided by just 1 and 421,185, it is not a prime number.