Q: Is 121,408 a Prime Number?
A: No, 121,408 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 121408 can be evenly divided by 1 2 4 7 8 14 16 28 32 56 64 112 224 271 448 542 1,084 1,897 2,168 3,794 4,336 7,588 8,672 15,176 17,344 30,352 60,704 and 121,408, with no remainder.
Since 121,408 cannot be divided by just 1 and 121,408, it is not a prime number.