A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1475600 can be evenly divided by 1 2 4 5 7 8 10 14 16 17 20 25 28 31 34 35 40 50 56 62 68 70 80 85 100 112 119 124 136 140 155 170 175 200 217 238 248 272 280 310 340 350 400 425 434 476 496 527 560 595 620 680 700 775 850 868 952 1,054 1,085 1,190 1,240 1,360 1,400 1,550 1,700 1,736 1,904 2,108 2,170 2,380 2,480 2,635 2,800 2,975 3,100 3,400 3,472 3,689 4,216 4,340 4,760 5,270 5,425 5,950 6,200 6,800 7,378 8,432 8,680 9,520 10,540 10,850 11,900 12,400 13,175 14,756 17,360 18,445 21,080 21,700 23,800 26,350 29,512 36,890 42,160 43,400 47,600 52,700 59,024 73,780 86,800 92,225 105,400 147,560 184,450 210,800 295,120 368,900 737,800 and 1,475,600, with no remainder.
Since 1,475,600 cannot be divided by just 1 and 1,475,600, it is not a prime number.