Q: Is 422,643 a Prime Number?
A: No, 422,643 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 422643 can be evenly divided by 1 3 13 39 10,837 32,511 140,881 and 422,643, with no remainder.
Since 422,643 cannot be divided by just 1 and 422,643, it is not a prime number.