A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2059050 can be evenly divided by 1 2 3 5 6 7 10 14 15 21 25 30 35 37 42 50 53 70 74 75 105 106 111 150 159 175 185 210 222 259 265 318 350 370 371 518 525 530 555 742 777 795 925 1,050 1,110 1,113 1,295 1,325 1,554 1,590 1,850 1,855 1,961 2,226 2,590 2,650 2,775 3,710 3,885 3,922 3,975 5,550 5,565 5,883 6,475 7,770 7,950 9,275 9,805 11,130 11,766 12,950 13,727 18,550 19,425 19,610 27,454 27,825 29,415 38,850 41,181 49,025 55,650 58,830 68,635 82,362 98,050 137,270 147,075 205,905 294,150 343,175 411,810 686,350 1,029,525 and 2,059,050, with no remainder.
Since 2,059,050 cannot be divided by just 1 and 2,059,050, it is not a prime number.