Q: Is 855,858 a Prime Number?
A: No, 855,858 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 855858 can be evenly divided by 1 2 3 6 67 134 201 402 2,129 4,258 6,387 12,774 142,643 285,286 427,929 and 855,858, with no remainder.
Since 855,858 cannot be divided by just 1 and 855,858, it is not a prime number.