Q: Is 422,640 a Prime Number?
A: No, 422,640 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 422640 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 36 40 45 48 60 72 80 90 120 144 180 240 360 587 720 1,174 1,761 2,348 2,935 3,522 4,696 5,283 5,870 7,044 8,805 9,392 10,566 11,740 14,088 17,610 21,132 23,480 26,415 28,176 35,220 42,264 46,960 52,830 70,440 84,528 105,660 140,880 211,320 and 422,640, with no remainder.
Since 422,640 cannot be divided by just 1 and 422,640, it is not a prime number.