Q: Is 121,920 a Prime Number?
A: No, 121,920 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 121920 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 64 80 96 120 127 160 192 240 254 320 381 480 508 635 762 960 1,016 1,270 1,524 1,905 2,032 2,540 3,048 3,810 4,064 5,080 6,096 7,620 8,128 10,160 12,192 15,240 20,320 24,384 30,480 40,640 60,960 and 121,920, with no remainder.
Since 121,920 cannot be divided by just 1 and 121,920, it is not a prime number.