Q: Is 121,858 a Prime Number?
A: No, 121,858 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 121858 can be evenly divided by 1 2 11 22 29 58 191 319 382 638 2,101 4,202 5,539 11,078 60,929 and 121,858, with no remainder.
Since 121,858 cannot be divided by just 1 and 121,858, it is not a prime number.