Q: Is 421,716 a Prime Number?
A: No, 421,716 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 421716 can be evenly divided by 1 2 3 4 6 12 113 226 311 339 452 622 678 933 1,244 1,356 1,866 3,732 35,143 70,286 105,429 140,572 210,858 and 421,716, with no remainder.
Since 421,716 cannot be divided by just 1 and 421,716, it is not a prime number.