Q: Is 421,705 a Prime Number?
A: No, 421,705 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 421705 can be evenly divided by 1 5 19 23 95 115 193 437 965 2,185 3,667 4,439 18,335 22,195 84,341 and 421,705, with no remainder.
Since 421,705 cannot be divided by just 1 and 421,705, it is not a prime number.