Q: Is 1,218,987 a Prime Number?
A: No, 1,218,987 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 1218987 can be evenly divided by 1 3 7 9 11 21 33 63 77 99 231 693 1,759 5,277 12,313 15,831 19,349 36,939 58,047 110,817 135,443 174,141 406,329 and 1,218,987, with no remainder.
Since 1,218,987 cannot be divided by just 1 and 1,218,987, it is not a prime number.