Q: Is 805,640 a Prime Number?
A: No, 805,640 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 805640 can be evenly divided by 1 2 4 5 8 10 11 20 22 40 44 55 88 110 220 440 1,831 3,662 7,324 9,155 14,648 18,310 20,141 36,620 40,282 73,240 80,564 100,705 161,128 201,410 402,820 and 805,640, with no remainder.
Since 805,640 cannot be divided by just 1 and 805,640, it is not a prime number.