A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4866225 can be evenly divided by 1 3 5 7 13 15 21 23 25 31 35 39 65 69 75 91 93 105 115 155 161 175 195 217 273 299 325 345 403 455 465 483 525 575 651 713 775 805 897 975 1,085 1,209 1,365 1,495 1,725 2,015 2,093 2,139 2,275 2,325 2,415 2,821 3,255 3,565 4,025 4,485 4,991 5,425 6,045 6,279 6,825 7,475 8,463 9,269 10,075 10,465 10,695 12,075 14,105 14,973 16,275 17,825 22,425 24,955 27,807 30,225 31,395 42,315 46,345 52,325 53,475 64,883 70,525 74,865 124,775 139,035 156,975 194,649 211,575 231,725 324,415 374,325 695,175 973,245 1,622,075 and 4,866,225, with no remainder.
Since 4,866,225 cannot be divided by just 1 and 4,866,225, it is not a prime number.