Q: Is 243,138 a Prime Number?
A: No, 243,138 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 243138 can be evenly divided by 1 2 3 6 7 14 21 42 49 98 147 294 827 1,654 2,481 4,962 5,789 11,578 17,367 34,734 40,523 81,046 121,569 and 243,138, with no remainder.
Since 243,138 cannot be divided by just 1 and 243,138, it is not a prime number.