The number 3,146,000 can be evenly divided by 1 2 4 5 8 10 11 13 16 20 22 25 26 40 44 50 52 55 65 80 88 100 104 110 121 125 130 143 176 200 208 220 242 250 260 275 286 325 400 440 484 500 520 550 572 605 650 715 880 968 1,000 1,040 1,100 1,144 1,210 1,300 1,375 1,430 1,573 1,625 1,936 2,000 2,200 2,288 2,420 2,600 2,750 2,860 3,025 3,146 3,250 3,575 4,400 4,840 5,200 5,500 5,720 6,050 6,292 6,500 7,150 7,865 9,680 11,000 11,440 12,100 12,584 13,000 14,300 15,125 15,730 17,875 22,000 24,200 25,168 26,000 28,600 30,250 31,460 35,750 39,325 48,400 57,200 60,500 62,920 71,500 78,650 121,000 125,840 143,000 157,300 196,625 242,000 286,000 314,600 393,250 629,200 786,500 1,573,000 and 3,146,000, with no remainder.
Since 3,146,000 cannot be divided by just 1 and 3,146,000, it is a composite number.