Q: Is 1,155,143 a Prime Number?
A: No, 1,155,143 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 1155143 can be evenly divided by 1 11 19 209 5,527 60,797 105,013 and 1,155,143, with no remainder.
Since 1,155,143 cannot be divided by just 1 and 1,155,143, it is not a prime number.