Q: Is 42,778 a Prime Number?
A: No, 42,778 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 42778 can be evenly divided by 1 2 73 146 293 586 21,389 and 42,778, with no remainder.
Since 42,778 cannot be divided by just 1 and 42,778, it is not a prime number.