The number 4,256,000 can be evenly divided by 1 2 4 5 7 8 10 14 16 19 20 25 28 32 35 38 40 50 56 64 70 76 80 95 100 112 125 128 133 140 152 160 175 190 200 224 250 256 266 280 304 320 350 380 400 448 475 500 532 560 608 640 665 700 760 800 875 896 950 1,000 1,064 1,120 1,216 1,280 1,330 1,400 1,520 1,600 1,750 1,792 1,900 2,000 2,128 2,240 2,375 2,432 2,660 2,800 3,040 3,200 3,325 3,500 3,800 4,000 4,256 4,480 4,750 4,864 5,320 5,600 6,080 6,400 6,650 7,000 7,600 8,000 8,512 8,960 9,500 10,640 11,200 12,160 13,300 14,000 15,200 16,000 16,625 17,024 19,000 21,280 22,400 24,320 26,600 28,000 30,400 32,000 33,250 34,048 38,000 42,560 44,800 53,200 56,000 60,800 66,500 76,000 85,120 106,400 112,000 121,600 133,000 152,000 170,240 212,800 224,000 266,000 304,000 425,600 532,000 608,000 851,200 1,064,000 2,128,000 and 4,256,000, with no remainder.
Since 4,256,000 cannot be divided by just 1 and 4,256,000, it is a composite number.