Q: Is 420,478 a Prime Number?
A: No, 420,478 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 420478 can be evenly divided by 1 2 17 34 83 149 166 298 1,411 2,533 2,822 5,066 12,367 24,734 210,239 and 420,478, with no remainder.
Since 420,478 cannot be divided by just 1 and 420,478, it is not a prime number.