Q: Is 12,345 a Prime Number?
A: No, 12,345 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 12345 can be evenly divided by 1 3 5 15 823 2,469 4,115 and 12,345, with no remainder.
Since 12,345 cannot be divided by just 1 and 12,345, it is not a prime number.