A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6048090 can be evenly divided by 1 2 3 5 6 9 10 15 17 18 30 34 45 51 59 67 85 90 102 118 134 153 170 177 201 255 295 306 335 354 402 510 531 590 603 670 765 885 1,003 1,005 1,062 1,139 1,206 1,530 1,770 2,006 2,010 2,278 2,655 3,009 3,015 3,417 3,953 5,015 5,310 5,695 6,018 6,030 6,834 7,906 9,027 10,030 10,251 11,390 11,859 15,045 17,085 18,054 19,765 20,502 23,718 30,090 34,170 35,577 39,530 45,135 51,255 59,295 67,201 71,154 90,270 102,510 118,590 134,402 177,885 201,603 336,005 355,770 403,206 604,809 672,010 1,008,015 1,209,618 2,016,030 3,024,045 and 6,048,090, with no remainder.
Since 6,048,090 cannot be divided by just 1 and 6,048,090, it is not a prime number.