A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4710615 can be evenly divided by 1 3 5 7 13 15 17 21 29 35 39 49 51 65 85 87 91 105 119 145 147 195 203 221 245 255 273 357 377 435 455 493 595 609 637 663 735 833 1,015 1,105 1,131 1,365 1,421 1,479 1,547 1,785 1,885 1,911 2,465 2,499 2,639 3,045 3,185 3,315 3,451 4,165 4,263 4,641 5,655 6,409 7,105 7,395 7,735 7,917 9,555 10,353 10,829 12,495 13,195 17,255 18,473 19,227 21,315 23,205 24,157 32,045 32,487 39,585 44,863 51,765 54,145 55,419 72,471 92,365 96,135 120,785 134,589 162,435 224,315 277,095 314,041 362,355 672,945 942,123 1,570,205 and 4,710,615, with no remainder.
Since 4,710,615 cannot be divided by just 1 and 4,710,615, it is not a prime number.