Q: Is 2,456,640 a Prime Number?
A: No, 2,456,640 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 2456640 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 32 36 40 45 48 60 64 72 80 90 96 120 144 160 180 192 240 288 320 360 480 576 720 853 960 1,440 1,706 2,559 2,880 3,412 4,265 5,118 6,824 7,677 8,530 10,236 12,795 13,648 15,354 17,060 20,472 25,590 27,296 30,708 34,120 38,385 40,944 51,180 54,592 61,416 68,240 76,770 81,888 102,360 122,832 136,480 153,540 163,776 204,720 245,664 272,960 307,080 409,440 491,328 614,160 818,880 1,228,320 and 2,456,640, with no remainder.
Since 2,456,640 cannot be divided by just 1 and 2,456,640, it is not a prime number.