Q: Is 1,218,258 a Prime Number?
A: No, 1,218,258 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 1218258 can be evenly divided by 1 2 3 6 9 18 53 106 159 318 477 954 1,277 2,554 3,831 7,662 11,493 22,986 67,681 135,362 203,043 406,086 609,129 and 1,218,258, with no remainder.
Since 1,218,258 cannot be divided by just 1 and 1,218,258, it is not a prime number.