Q: Is 421,570 a Prime Number?
A: No, 421,570 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 421570 can be evenly divided by 1 2 5 10 42,157 84,314 210,785 and 421,570, with no remainder.
Since 421,570 cannot be divided by just 1 and 421,570, it is not a prime number.