Q: Is 421,165 a Prime Number?
A: No, 421,165 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 421165 can be evenly divided by 1 5 131 643 655 3,215 84,233 and 421,165, with no remainder.
Since 421,165 cannot be divided by just 1 and 421,165, it is not a prime number.