A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2705076 can be evenly divided by 1 2 3 4 6 9 11 12 18 22 23 27 33 36 44 46 54 66 69 81 92 99 108 121 132 138 162 198 207 242 243 253 276 297 324 363 396 414 484 486 506 594 621 726 759 828 891 972 1,012 1,089 1,188 1,242 1,452 1,518 1,782 1,863 2,178 2,277 2,484 2,673 2,783 3,036 3,267 3,564 3,726 4,356 4,554 5,346 5,566 5,589 6,534 6,831 7,452 8,349 9,108 9,801 10,692 11,132 11,178 13,068 13,662 16,698 19,602 20,493 22,356 25,047 27,324 29,403 33,396 39,204 40,986 50,094 58,806 61,479 75,141 81,972 100,188 117,612 122,958 150,282 225,423 245,916 300,564 450,846 676,269 901,692 1,352,538 and 2,705,076, with no remainder.
Since 2,705,076 cannot be divided by just 1 and 2,705,076, it is not a prime number.