Q: Is 509,855 a Prime Number?
A: No, 509,855 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 509855 can be evenly divided by 1 5 107 535 953 4,765 101,971 and 509,855, with no remainder.
Since 509,855 cannot be divided by just 1 and 509,855, it is not a prime number.