Q: Is 855,520 a Prime Number?
A: No, 855,520 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 855520 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 80 160 5,347 10,694 21,388 26,735 42,776 53,470 85,552 106,940 171,104 213,880 427,760 and 855,520, with no remainder.
Since 855,520 cannot be divided by just 1 and 855,520, it is not a prime number.