Q: Is 123,840 a Prime Number?
A: No, 123,840 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 123840 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 32 36 40 43 45 48 60 64 72 80 86 90 96 120 129 144 160 172 180 192 215 240 258 288 320 344 360 387 430 480 516 576 645 688 720 774 860 960 1,032 1,290 1,376 1,440 1,548 1,720 1,935 2,064 2,580 2,752 2,880 3,096 3,440 3,870 4,128 5,160 6,192 6,880 7,740 8,256 10,320 12,384 13,760 15,480 20,640 24,768 30,960 41,280 61,920 and 123,840, with no remainder.
Since 123,840 cannot be divided by just 1 and 123,840, it is not a prime number.