Q: Is 861,508 a Prime Number?
A: No, 861,508 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 861508 can be evenly divided by 1 2 4 37 74 148 5,821 11,642 23,284 215,377 430,754 and 861,508, with no remainder.
Since 861,508 cannot be divided by just 1 and 861,508, it is not a prime number.