Q: Is 1,388,431 a Prime Number?
A: No, 1,388,431 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 1388431 can be evenly divided by 1 11 113 1,117 1,243 12,287 126,221 and 1,388,431, with no remainder.
Since 1,388,431 cannot be divided by just 1 and 1,388,431, it is not a prime number.