Q: Is 121,863 a Prime Number?
A: No, 121,863 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 121863 can be evenly divided by 1 3 7 21 49 147 829 2,487 5,803 17,409 40,621 and 121,863, with no remainder.
Since 121,863 cannot be divided by just 1 and 121,863, it is not a prime number.