Q: Is 421,567 a Prime Number?
A: No, 421,567 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 421567 can be evenly divided by 1 23 18,329 and 421,567, with no remainder.
Since 421,567 cannot be divided by just 1 and 421,567, it is not a prime number.