Q: Is 1,278,777 a Prime Number?
A: No, 1,278,777 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 1278777 can be evenly divided by 1 3 23 43 69 129 431 989 1,293 2,967 9,913 18,533 29,739 55,599 426,259 and 1,278,777, with no remainder.
Since 1,278,777 cannot be divided by just 1 and 1,278,777, it is not a prime number.