Q: Is 243,705 a Prime Number?
A: No, 243,705 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 243705 can be evenly divided by 1 3 5 7 11 15 21 33 35 55 77 105 165 211 231 385 633 1,055 1,155 1,477 2,321 3,165 4,431 6,963 7,385 11,605 16,247 22,155 34,815 48,741 81,235 and 243,705, with no remainder.
Since 243,705 cannot be divided by just 1 and 243,705, it is not a prime number.