Q: Is 855,105 a Prime Number?
A: No, 855,105 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 855105 can be evenly divided by 1 3 5 15 109 327 523 545 1,569 1,635 2,615 7,845 57,007 171,021 285,035 and 855,105, with no remainder.
Since 855,105 cannot be divided by just 1 and 855,105, it is not a prime number.