A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2759460 can be evenly divided by 1 2 3 4 5 6 10 11 12 15 20 22 30 33 37 44 55 60 66 74 110 111 113 132 148 165 185 220 222 226 330 339 370 407 444 452 555 565 660 678 740 814 1,110 1,130 1,221 1,243 1,356 1,628 1,695 2,035 2,220 2,260 2,442 2,486 3,390 3,729 4,070 4,181 4,884 4,972 6,105 6,215 6,780 7,458 8,140 8,362 12,210 12,430 12,543 14,916 16,724 18,645 20,905 24,420 24,860 25,086 37,290 41,810 45,991 50,172 62,715 74,580 83,620 91,982 125,430 137,973 183,964 229,955 250,860 275,946 459,910 551,892 689,865 919,820 1,379,730 and 2,759,460, with no remainder.
Since 2,759,460 cannot be divided by just 1 and 2,759,460, it is not a prime number.