Q: Is 420,342 a Prime Number?
A: No, 420,342 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 420342 can be evenly divided by 1 2 3 6 13 17 26 34 39 51 78 102 221 317 442 634 663 951 1,326 1,902 4,121 5,389 8,242 10,778 12,363 16,167 24,726 32,334 70,057 140,114 210,171 and 420,342, with no remainder.
Since 420,342 cannot be divided by just 1 and 420,342, it is not a prime number.