A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1573200 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 19 20 23 24 25 30 36 38 40 45 46 48 50 57 60 69 72 75 76 80 90 92 95 100 114 115 120 138 144 150 152 171 180 184 190 200 207 225 228 230 240 276 285 300 304 342 345 360 368 380 400 414 437 450 456 460 475 552 570 575 600 684 690 720 760 828 855 874 900 912 920 950 1,035 1,104 1,140 1,150 1,200 1,311 1,368 1,380 1,425 1,520 1,656 1,710 1,725 1,748 1,800 1,840 1,900 2,070 2,185 2,280 2,300 2,622 2,736 2,760 2,850 3,312 3,420 3,450 3,496 3,600 3,800 3,933 4,140 4,275 4,370 4,560 4,600 5,175 5,244 5,520 5,700 6,555 6,840 6,900 6,992 7,600 7,866 8,280 8,550 8,740 9,200 10,350 10,488 10,925 11,400 13,110 13,680 13,800 15,732 16,560 17,100 17,480 19,665 20,700 20,976 21,850 22,800 26,220 27,600 31,464 32,775 34,200 34,960 39,330 41,400 43,700 52,440 62,928 65,550 68,400 78,660 82,800 87,400 98,325 104,880 131,100 157,320 174,800 196,650 262,200 314,640 393,300 524,400 786,600 and 1,573,200, with no remainder.
Since 1,573,200 cannot be divided by just 1 and 1,573,200, it is not a prime number.