Q: Is 523,420 a Prime Number?
A: No, 523,420 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 523420 can be evenly divided by 1 2 4 5 10 20 26,171 52,342 104,684 130,855 261,710 and 523,420, with no remainder.
Since 523,420 cannot be divided by just 1 and 523,420, it is not a prime number.