Q: Is 420,138 a Prime Number?
A: No, 420,138 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 420138 can be evenly divided by 1 2 3 6 9 17 18 34 51 102 153 306 1,373 2,746 4,119 8,238 12,357 23,341 24,714 46,682 70,023 140,046 210,069 and 420,138, with no remainder.
Since 420,138 cannot be divided by just 1 and 420,138, it is not a prime number.