Q: Is 121,563 a Prime Number?
A: No, 121,563 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 121563 can be evenly divided by 1 3 9 13 39 117 1,039 3,117 9,351 13,507 40,521 and 121,563, with no remainder.
Since 121,563 cannot be divided by just 1 and 121,563, it is not a prime number.