The number 2,691,000 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 13 15 18 20 23 24 25 26 30 36 39 40 45 46 50 52 60 65 69 72 75 78 90 92 100 104 115 117 120 125 130 138 150 156 180 184 195 200 207 225 230 234 250 260 276 299 300 312 325 345 360 375 390 414 450 460 468 500 520 552 575 585 598 600 650 690 750 780 828 897 900 920 936 975 1,000 1,035 1,125 1,150 1,170 1,196 1,300 1,380 1,495 1,500 1,560 1,625 1,656 1,725 1,794 1,800 1,950 2,070 2,250 2,300 2,340 2,392 2,600 2,691 2,760 2,875 2,925 2,990 3,000 3,250 3,450 3,588 3,900 4,140 4,485 4,500 4,600 4,680 4,875 5,175 5,382 5,750 5,850 5,980 6,500 6,900 7,176 7,475 7,800 8,280 8,625 8,970 9,000 9,750 10,350 10,764 11,500 11,700 11,960 13,000 13,455 13,800 14,625 14,950 17,250 17,940 19,500 20,700 21,528 22,425 23,000 23,400 25,875 26,910 29,250 29,900 34,500 35,880 37,375 39,000 41,400 44,850 51,750 53,820 58,500 59,800 67,275 69,000 74,750 89,700 103,500 107,640 112,125 117,000 134,550 149,500 179,400 207,000 224,250 269,100 299,000 336,375 448,500 538,200 672,750 897,000 1,345,500 and 2,691,000, with no remainder.
Since 2,691,000 cannot be divided by just 1 and 2,691,000, it is a composite number.