Q: Is 423,405 a Prime Number?
A: No, 423,405 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 423405 can be evenly divided by 1 3 5 9 15 45 97 291 485 873 1,455 4,365 9,409 28,227 47,045 84,681 141,135 and 423,405, with no remainder.
Since 423,405 cannot be divided by just 1 and 423,405, it is not a prime number.