Q: Is 855,550 a Prime Number?
A: No, 855,550 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 855550 can be evenly divided by 1 2 5 10 25 50 71 142 241 355 482 710 1,205 1,775 2,410 3,550 6,025 12,050 17,111 34,222 85,555 171,110 427,775 and 855,550, with no remainder.
Since 855,550 cannot be divided by just 1 and 855,550, it is not a prime number.