A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2012040 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 18 20 23 24 27 30 36 40 45 46 54 60 69 72 81 90 92 108 115 120 135 138 162 180 184 207 216 230 243 270 276 324 345 360 405 414 460 486 540 552 621 648 690 729 810 828 920 972 1,035 1,080 1,215 1,242 1,380 1,458 1,620 1,656 1,863 1,944 2,070 2,187 2,430 2,484 2,760 2,916 3,105 3,240 3,645 3,726 4,140 4,374 4,860 4,968 5,589 5,832 6,210 7,290 7,452 8,280 8,748 9,315 9,720 10,935 11,178 12,420 14,580 14,904 16,767 17,496 18,630 21,870 22,356 24,840 27,945 29,160 33,534 37,260 43,740 44,712 50,301 55,890 67,068 74,520 83,835 87,480 100,602 111,780 134,136 167,670 201,204 223,560 251,505 335,340 402,408 503,010 670,680 1,006,020 and 2,012,040, with no remainder.
Since 2,012,040 cannot be divided by just 1 and 2,012,040, it is not a prime number.