The number 1,734,000 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 17 20 24 25 30 34 40 48 50 51 60 68 75 80 85 100 102 120 125 136 150 170 200 204 240 250 255 272 289 300 340 375 400 408 425 500 510 578 600 680 750 816 850 867 1,000 1,020 1,156 1,200 1,275 1,360 1,445 1,500 1,700 1,734 2,000 2,040 2,125 2,312 2,550 2,890 3,000 3,400 3,468 4,080 4,250 4,335 4,624 5,100 5,780 6,000 6,375 6,800 6,936 7,225 8,500 8,670 10,200 11,560 12,750 13,872 14,450 17,000 17,340 20,400 21,675 23,120 25,500 28,900 34,000 34,680 36,125 43,350 51,000 57,800 69,360 72,250 86,700 102,000 108,375 115,600 144,500 173,400 216,750 289,000 346,800 433,500 578,000 867,000 and 1,734,000, with no remainder.
Since 1,734,000 cannot be divided by just 1 and 1,734,000, it is a composite number.