Q: Is 261,243 a Prime Number?
A: No, 261,243 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 261243 can be evenly divided by 1 3 9 29,027 87,081 and 261,243, with no remainder.
Since 261,243 cannot be divided by just 1 and 261,243, it is not a prime number.