Q: Is 1,221,431 a Prime Number?
A: No, 1,221,431 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 1221431 can be evenly divided by 1 31 41 961 1,271 29,791 39,401 and 1,221,431, with no remainder.
Since 1,221,431 cannot be divided by just 1 and 1,221,431, it is not a prime number.