Q: Is 1,221,508 a Prime Number?
A: No, 1,221,508 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 1221508 can be evenly divided by 1 2 4 305,377 610,754 and 1,221,508, with no remainder.
Since 1,221,508 cannot be divided by just 1 and 1,221,508, it is not a prime number.