A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 745200 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 23 24 25 27 30 36 40 45 46 48 50 54 60 69 72 75 80 81 90 92 100 108 115 120 135 138 144 150 162 180 184 200 207 216 225 230 240 270 276 300 324 345 360 368 400 405 414 432 450 460 540 552 575 600 621 648 675 690 720 810 828 900 920 1,035 1,080 1,104 1,150 1,200 1,242 1,296 1,350 1,380 1,620 1,656 1,725 1,800 1,840 1,863 2,025 2,070 2,160 2,300 2,484 2,700 2,760 3,105 3,240 3,312 3,450 3,600 3,726 4,050 4,140 4,600 4,968 5,175 5,400 5,520 6,210 6,480 6,900 7,452 8,100 8,280 9,200 9,315 9,936 10,350 10,800 12,420 13,800 14,904 15,525 16,200 16,560 18,630 20,700 24,840 27,600 29,808 31,050 32,400 37,260 41,400 46,575 49,680 62,100 74,520 82,800 93,150 124,200 149,040 186,300 248,400 372,600 and 745,200, with no remainder.
Since 745,200 cannot be divided by just 1 and 745,200, it is not a prime number.