A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3592160 can be evenly divided by 1 2 4 5 8 10 11 13 16 20 22 26 32 40 44 52 55 65 80 88 104 110 130 143 157 160 176 208 220 260 286 314 352 416 440 520 572 628 715 785 880 1,040 1,144 1,256 1,430 1,570 1,727 1,760 2,041 2,080 2,288 2,512 2,860 3,140 3,454 4,082 4,576 5,024 5,720 6,280 6,908 8,164 8,635 10,205 11,440 12,560 13,816 16,328 17,270 20,410 22,451 22,880 25,120 27,632 32,656 34,540 40,820 44,902 55,264 65,312 69,080 81,640 89,804 112,255 138,160 163,280 179,608 224,510 276,320 326,560 359,216 449,020 718,432 898,040 1,796,080 and 3,592,160, with no remainder.
Since 3,592,160 cannot be divided by just 1 and 3,592,160, it is not a prime number.