Q: Is 420,523 a Prime Number?
A: No, 420,523 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 420523 can be evenly divided by 1 211 1,993 and 420,523, with no remainder.
Since 420,523 cannot be divided by just 1 and 420,523, it is not a prime number.