Q: Is 421,767 a Prime Number?
A: No, 421,767 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 421767 can be evenly divided by 1 3 9 27 41 81 123 127 369 381 1,107 1,143 3,321 3,429 5,207 10,287 15,621 46,863 140,589 and 421,767, with no remainder.
Since 421,767 cannot be divided by just 1 and 421,767, it is not a prime number.