Q: Is 687,842 a Prime Number?
A: No, 687,842 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 687842 can be evenly divided by 1 2 239 478 1,439 2,878 343,921 and 687,842, with no remainder.
Since 687,842 cannot be divided by just 1 and 687,842, it is not a prime number.