A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4501560 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 20 21 23 24 28 30 35 40 42 46 56 60 69 70 84 92 105 115 120 138 140 161 168 184 210 230 233 276 280 322 345 420 460 466 483 552 644 690 699 805 840 920 932 966 1,165 1,288 1,380 1,398 1,610 1,631 1,864 1,932 2,330 2,415 2,760 2,796 3,220 3,262 3,495 3,864 4,660 4,830 4,893 5,359 5,592 6,440 6,524 6,990 8,155 9,320 9,660 9,786 10,718 13,048 13,980 16,077 16,310 19,320 19,572 21,436 24,465 26,795 27,960 32,154 32,620 37,513 39,144 42,872 48,930 53,590 64,308 65,240 75,026 80,385 97,860 107,180 112,539 128,616 150,052 160,770 187,565 195,720 214,360 225,078 300,104 321,540 375,130 450,156 562,695 643,080 750,260 900,312 1,125,390 1,500,520 2,250,780 and 4,501,560, with no remainder.
Since 4,501,560 cannot be divided by just 1 and 4,501,560, it is not a prime number.