Q: Is 15,729 a Prime Number?
A: No, 15,729 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 15729 can be evenly divided by 1 3 7 21 49 107 147 321 749 2,247 5,243 and 15,729, with no remainder.
Since 15,729 cannot be divided by just 1 and 15,729, it is not a prime number.