Q: Is 840,243 a Prime Number?
A: No, 840,243 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 840243 can be evenly divided by 1 3 379 739 1,137 2,217 280,081 and 840,243, with no remainder.
Since 840,243 cannot be divided by just 1 and 840,243, it is not a prime number.