Q: Is 1,609,440 a Prime Number?
A: No, 1,609,440 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1609440 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 28 30 32 35 40 42 48 56 60 70 80 84 96 105 112 120 140 160 168 210 224 240 280 336 420 479 480 560 672 840 958 1,120 1,437 1,680 1,916 2,395 2,874 3,353 3,360 3,832 4,790 5,748 6,706 7,185 7,664 9,580 10,059 11,496 13,412 14,370 15,328 16,765 19,160 20,118 22,992 26,824 28,740 33,530 38,320 40,236 45,984 50,295 53,648 57,480 67,060 76,640 80,472 100,590 107,296 114,960 134,120 160,944 201,180 229,920 268,240 321,888 402,360 536,480 804,720 and 1,609,440, with no remainder.
Since 1,609,440 cannot be divided by just 1 and 1,609,440, it is not a prime number.