The number 822,120 can be evenly divided by 1 2 3 4 5 6 8 10 12 13 15 17 20 24 26 30 31 34 39 40 51 52 60 62 65 68 78 85 93 102 104 120 124 130 136 155 156 170 186 195 204 221 248 255 260 310 312 340 372 390 403 408 442 465 510 520 527 620 663 680 744 780 806 884 930 1,020 1,054 1,105 1,209 1,240 1,326 1,560 1,581 1,612 1,768 1,860 2,015 2,040 2,108 2,210 2,418 2,635 2,652 3,162 3,224 3,315 3,720 4,030 4,216 4,420 4,836 5,270 5,304 6,045 6,324 6,630 6,851 7,905 8,060 8,840 9,672 10,540 12,090 12,648 13,260 13,702 15,810 16,120 20,553 21,080 24,180 26,520 27,404 31,620 34,255 41,106 48,360 54,808 63,240 68,510 82,212 102,765 137,020 164,424 205,530 274,040 411,060 and 822,120, with no remainder.
Since 822,120 cannot be divided by just 1 and 822,120, it is a composite number.