Q: Is 321,840 a Prime Number?
A: No, 321,840 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 321840 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 36 40 45 48 54 60 72 80 90 108 120 135 144 149 180 216 240 270 298 360 432 447 540 596 720 745 894 1,080 1,192 1,341 1,490 1,788 2,160 2,235 2,384 2,682 2,980 3,576 4,023 4,470 5,364 5,960 6,705 7,152 8,046 8,940 10,728 11,920 13,410 16,092 17,880 20,115 21,456 26,820 32,184 35,760 40,230 53,640 64,368 80,460 107,280 160,920 and 321,840, with no remainder.
Since 321,840 cannot be divided by just 1 and 321,840, it is not a prime number.