Q: Is 421,571 a Prime Number?
A: No, 421,571 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 421571 can be evenly divided by 1 61 6,911 and 421,571, with no remainder.
Since 421,571 cannot be divided by just 1 and 421,571, it is not a prime number.