Q: Is 121,788 a Prime Number?
A: No, 121,788 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 121788 can be evenly divided by 1 2 3 4 6 9 12 17 18 34 36 51 68 102 153 199 204 306 398 597 612 796 1,194 1,791 2,388 3,383 3,582 6,766 7,164 10,149 13,532 20,298 30,447 40,596 60,894 and 121,788, with no remainder.
Since 121,788 cannot be divided by just 1 and 121,788, it is not a prime number.