A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6134520 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 20 21 24 28 30 35 40 42 56 60 67 70 84 105 109 120 134 140 168 201 210 218 268 280 327 335 402 420 436 469 536 545 654 670 763 804 840 872 938 1,005 1,090 1,308 1,340 1,407 1,526 1,608 1,635 1,876 2,010 2,180 2,289 2,345 2,616 2,680 2,814 3,052 3,270 3,752 3,815 4,020 4,360 4,578 4,690 5,628 6,104 6,540 7,035 7,303 7,630 8,040 9,156 9,380 11,256 11,445 13,080 14,070 14,606 15,260 18,312 18,760 21,909 22,890 28,140 29,212 30,520 36,515 43,818 45,780 51,121 56,280 58,424 73,030 87,636 91,560 102,242 109,545 146,060 153,363 175,272 204,484 219,090 255,605 292,120 306,726 408,968 438,180 511,210 613,452 766,815 876,360 1,022,420 1,226,904 1,533,630 2,044,840 3,067,260 and 6,134,520, with no remainder.
Since 6,134,520 cannot be divided by just 1 and 6,134,520, it is not a prime number.