Q: Is 243,505 a Prime Number?
A: No, 243,505 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 243505 can be evenly divided by 1 5 31 155 1,571 7,855 48,701 and 243,505, with no remainder.
Since 243,505 cannot be divided by just 1 and 243,505, it is not a prime number.