A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 7532280 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 28 30 35 36 40 42 45 49 56 60 61 63 70 72 84 90 98 105 120 122 126 140 147 168 180 183 196 210 244 245 252 280 294 305 315 343 360 366 392 420 427 441 488 490 504 549 588 610 630 686 732 735 840 854 882 915 980 1,029 1,098 1,176 1,220 1,260 1,281 1,372 1,464 1,470 1,708 1,715 1,764 1,830 1,960 2,058 2,135 2,196 2,205 2,440 2,520 2,562 2,744 2,745 2,940 2,989 3,087 3,416 3,430 3,528 3,660 3,843 4,116 4,270 4,392 4,410 5,124 5,145 5,490 5,880 5,978 6,174 6,405 6,860 7,320 7,686 8,232 8,540 8,820 8,967 10,248 10,290 10,980 11,956 12,348 12,810 13,720 14,945 15,372 15,435 17,080 17,640 17,934 19,215 20,580 20,923 21,960 23,912 24,696 25,620 26,901 29,890 30,744 30,870 35,868 38,430 41,160 41,846 44,835 51,240 53,802 59,780 61,740 62,769 71,736 76,860 83,692 89,670 104,615 107,604 119,560 123,480 125,538 134,505 153,720 167,384 179,340 188,307 209,230 215,208 251,076 269,010 313,845 358,680 376,614 418,460 502,152 538,020 627,690 753,228 836,920 941,535 1,076,040 1,255,380 1,506,456 1,883,070 2,510,760 3,766,140 and 7,532,280, with no remainder.
Since 7,532,280 cannot be divided by just 1 and 7,532,280, it is not a prime number.