Q: Is 578,420 a Prime Number?
A: No, 578,420 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 578420 can be evenly divided by 1 2 4 5 10 20 28,921 57,842 115,684 144,605 289,210 and 578,420, with no remainder.
Since 578,420 cannot be divided by just 1 and 578,420, it is not a prime number.