Q: Is 421,736 a Prime Number?
A: No, 421,736 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 421736 can be evenly divided by 1 2 4 7 8 14 17 28 34 56 68 119 136 238 443 476 886 952 1,772 3,101 3,544 6,202 7,531 12,404 15,062 24,808 30,124 52,717 60,248 105,434 210,868 and 421,736, with no remainder.
Since 421,736 cannot be divided by just 1 and 421,736, it is not a prime number.