Q: Is 1,155,509 a Prime Number?
A: No, 1,155,509 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 1155509 can be evenly divided by 1 109 10,601 and 1,155,509, with no remainder.
Since 1,155,509 cannot be divided by just 1 and 1,155,509, it is not a prime number.