Q: Is 855,691 a Prime Number?
A: No, 855,691 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 855691 can be evenly divided by 1 577 1,483 and 855,691, with no remainder.
Since 855,691 cannot be divided by just 1 and 855,691, it is not a prime number.