Q: Is 878,420 a Prime Number?
A: No, 878,420 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 878420 can be evenly divided by 1 2 4 5 10 20 167 263 334 526 668 835 1,052 1,315 1,670 2,630 3,340 5,260 43,921 87,842 175,684 219,605 439,210 and 878,420, with no remainder.
Since 878,420 cannot be divided by just 1 and 878,420, it is not a prime number.