Q: Is 422,780 a Prime Number?
A: No, 422,780 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 422780 can be evenly divided by 1 2 4 5 10 20 21,139 42,278 84,556 105,695 211,390 and 422,780, with no remainder.
Since 422,780 cannot be divided by just 1 and 422,780, it is not a prime number.