Q: Is 687,142 a Prime Number?
A: No, 687,142 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 687142 can be evenly divided by 1 2 79 158 4,349 8,698 343,571 and 687,142, with no remainder.
Since 687,142 cannot be divided by just 1 and 687,142, it is not a prime number.