Q: Is 243,507 a Prime Number?
A: No, 243,507 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 243507 can be evenly divided by 1 3 11 33 47 141 157 471 517 1,551 1,727 5,181 7,379 22,137 81,169 and 243,507, with no remainder.
Since 243,507 cannot be divided by just 1 and 243,507, it is not a prime number.