Q: Is 42,543 a Prime Number?
A: No, 42,543 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 42543 can be evenly divided by 1 3 9 29 87 163 261 489 1,467 4,727 14,181 and 42,543, with no remainder.
Since 42,543 cannot be divided by just 1 and 42,543, it is not a prime number.