A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8138130 can be evenly divided by 1 2 3 5 6 7 10 11 13 14 15 21 22 26 30 33 35 39 42 55 65 66 70 77 78 91 105 110 130 143 154 165 182 195 210 231 271 273 286 330 385 390 429 455 462 542 546 715 770 813 858 910 1,001 1,155 1,355 1,365 1,430 1,626 1,897 2,002 2,145 2,310 2,710 2,730 2,981 3,003 3,523 3,794 4,065 4,290 5,005 5,691 5,962 6,006 7,046 8,130 8,943 9,485 10,010 10,569 11,382 14,905 15,015 17,615 17,886 18,970 20,867 21,138 24,661 28,455 29,810 30,030 35,230 38,753 41,734 44,715 49,322 52,845 56,910 62,601 73,983 77,506 89,430 104,335 105,690 116,259 123,305 125,202 147,966 193,765 208,670 232,518 246,610 271,271 313,005 369,915 387,530 542,542 581,295 626,010 739,830 813,813 1,162,590 1,356,355 1,627,626 2,712,710 4,069,065 and 8,138,130, with no remainder.
Since 8,138,130 cannot be divided by just 1 and 8,138,130, it is not a prime number.