Q: Is 178,420 a Prime Number?
A: No, 178,420 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 178420 can be evenly divided by 1 2 4 5 10 11 20 22 44 55 110 220 811 1,622 3,244 4,055 8,110 8,921 16,220 17,842 35,684 44,605 89,210 and 178,420, with no remainder.
Since 178,420 cannot be divided by just 1 and 178,420, it is not a prime number.