Q: Is 78,420 a Prime Number?
A: No, 78,420 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 78420 can be evenly divided by 1 2 3 4 5 6 10 12 15 20 30 60 1,307 2,614 3,921 5,228 6,535 7,842 13,070 15,684 19,605 26,140 39,210 and 78,420, with no remainder.
Since 78,420 cannot be divided by just 1 and 78,420, it is not a prime number.