Q: Is 243,105 a Prime Number?
A: No, 243,105 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 243105 can be evenly divided by 1 3 5 15 19 57 95 285 853 2,559 4,265 12,795 16,207 48,621 81,035 and 243,105, with no remainder.
Since 243,105 cannot be divided by just 1 and 243,105, it is not a prime number.