Q: Is 157,920 a Prime Number?
A: No, 157,920 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 157920 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 28 30 32 35 40 42 47 48 56 60 70 80 84 94 96 105 112 120 140 141 160 168 188 210 224 235 240 280 282 329 336 376 420 470 480 560 564 658 672 705 752 840 940 987 1,120 1,128 1,316 1,410 1,504 1,645 1,680 1,880 1,974 2,256 2,632 2,820 3,290 3,360 3,760 3,948 4,512 4,935 5,264 5,640 6,580 7,520 7,896 9,870 10,528 11,280 13,160 15,792 19,740 22,560 26,320 31,584 39,480 52,640 78,960 and 157,920, with no remainder.
Since 157,920 cannot be divided by just 1 and 157,920, it is not a prime number.