Q: Is 12,789 a Prime Number?
A: No, 12,789 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 12789 can be evenly divided by 1 3 7 9 21 29 49 63 87 147 203 261 441 609 1,421 1,827 4,263 and 12,789, with no remainder.
Since 12,789 cannot be divided by just 1 and 12,789, it is not a prime number.