Q: Is 15,678 a Prime Number?
A: No, 15,678 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 15678 can be evenly divided by 1 2 3 6 9 13 18 26 39 67 78 117 134 201 234 402 603 871 1,206 1,742 2,613 5,226 7,839 and 15,678, with no remainder.
Since 15,678 cannot be divided by just 1 and 15,678, it is not a prime number.