Q: Is 1,278,243 a Prime Number?
A: No, 1,278,243 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 1278243 can be evenly divided by 1 3 9 109 327 981 1,303 3,909 11,727 142,027 426,081 and 1,278,243, with no remainder.
Since 1,278,243 cannot be divided by just 1 and 1,278,243, it is not a prime number.