Q: Is 420,318 a Prime Number?
A: No, 420,318 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 420318 can be evenly divided by 1 2 3 6 9 18 19 38 57 114 171 342 1,229 2,458 3,687 7,374 11,061 22,122 23,351 46,702 70,053 140,106 210,159 and 420,318, with no remainder.
Since 420,318 cannot be divided by just 1 and 420,318, it is not a prime number.