Q: Is 842,640 a Prime Number?
A: No, 842,640 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 842640 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 60 80 120 240 3,511 7,022 10,533 14,044 17,555 21,066 28,088 35,110 42,132 52,665 56,176 70,220 84,264 105,330 140,440 168,528 210,660 280,880 421,320 and 842,640, with no remainder.
Since 842,640 cannot be divided by just 1 and 842,640, it is not a prime number.