The number 274,560 can be evenly divided by 1 2 3 4 5 6 8 10 11 12 13 15 16 20 22 24 26 30 32 33 39 40 44 48 52 55 60 64 65 66 78 80 88 96 104 110 120 128 130 132 143 156 160 165 176 192 195 208 220 240 260 264 286 312 320 330 352 384 390 416 429 440 480 520 528 572 624 640 660 704 715 780 832 858 880 960 1,040 1,056 1,144 1,248 1,320 1,408 1,430 1,560 1,664 1,716 1,760 1,920 2,080 2,112 2,145 2,288 2,496 2,640 2,860 3,120 3,432 3,520 4,160 4,224 4,290 4,576 4,992 5,280 5,720 6,240 6,864 7,040 8,320 8,580 9,152 10,560 11,440 12,480 13,728 17,160 18,304 21,120 22,880 24,960 27,456 34,320 45,760 54,912 68,640 91,520 137,280 and 274,560, with no remainder.
Since 274,560 cannot be divided by just 1 and 274,560, it is a composite number.