Q: Is 506,421 a Prime Number?
A: No, 506,421 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 506421 can be evenly divided by 1 3 9 56,269 168,807 and 506,421, with no remainder.
Since 506,421 cannot be divided by just 1 and 506,421, it is not a prime number.