The number 3,291,300 can be evenly divided by 1 2 3 4 5 6 9 10 12 15 18 20 23 25 27 30 36 45 46 50 53 54 60 69 75 90 92 100 106 108 115 135 138 150 159 180 207 212 225 230 265 270 276 300 318 345 414 450 460 477 530 540 575 621 636 675 690 795 828 900 954 1,035 1,060 1,150 1,219 1,242 1,325 1,350 1,380 1,431 1,590 1,725 1,908 2,070 2,300 2,385 2,438 2,484 2,650 2,700 2,862 3,105 3,180 3,450 3,657 3,975 4,140 4,770 4,876 5,175 5,300 5,724 6,095 6,210 6,900 7,155 7,314 7,950 9,540 10,350 10,971 11,925 12,190 12,420 14,310 14,628 15,525 15,900 18,285 20,700 21,942 23,850 24,380 28,620 30,475 31,050 32,913 35,775 36,570 43,884 47,700 54,855 60,950 62,100 65,826 71,550 73,140 91,425 109,710 121,900 131,652 143,100 164,565 182,850 219,420 274,275 329,130 365,700 548,550 658,260 822,825 1,097,100 1,645,650 and 3,291,300, with no remainder.
Since 3,291,300 cannot be divided by just 1 and 3,291,300, it is a composite number.