Q: Is 420,520 a Prime Number?
A: No, 420,520 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 420520 can be evenly divided by 1 2 4 5 8 10 20 40 10,513 21,026 42,052 52,565 84,104 105,130 210,260 and 420,520, with no remainder.
Since 420,520 cannot be divided by just 1 and 420,520, it is not a prime number.