The number 1,342,656 can be evenly divided by 1 2 3 4 6 7 8 9 12 14 16 18 21 24 27 28 32 36 37 42 48 54 56 63 64 72 74 81 84 96 108 111 112 126 144 148 162 168 189 192 216 222 224 252 259 288 296 324 333 336 378 432 444 448 504 518 567 576 592 648 666 672 756 777 864 888 999 1,008 1,036 1,134 1,184 1,296 1,332 1,344 1,512 1,554 1,728 1,776 1,998 2,016 2,072 2,268 2,331 2,368 2,592 2,664 2,997 3,024 3,108 3,552 3,996 4,032 4,144 4,536 4,662 5,184 5,328 5,994 6,048 6,216 6,993 7,104 7,992 8,288 9,072 9,324 10,656 11,988 12,096 12,432 13,986 15,984 16,576 18,144 18,648 20,979 21,312 23,976 24,864 27,972 31,968 36,288 37,296 41,958 47,952 49,728 55,944 63,936 74,592 83,916 95,904 111,888 149,184 167,832 191,808 223,776 335,664 447,552 671,328 and 1,342,656, with no remainder.
Since 1,342,656 cannot be divided by just 1 and 1,342,656, it is a composite number.