Q: Is 123,543 a Prime Number?
A: No, 123,543 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 123543 can be evenly divided by 1 3 7 9 21 37 53 63 111 159 259 333 371 477 777 1,113 1,961 2,331 3,339 5,883 13,727 17,649 41,181 and 123,543, with no remainder.
Since 123,543 cannot be divided by just 1 and 123,543, it is not a prime number.