Q: Is 320,840 a Prime Number?
A: No, 320,840 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 320840 can be evenly divided by 1 2 4 5 8 10 13 20 26 40 52 65 104 130 260 520 617 1,234 2,468 3,085 4,936 6,170 8,021 12,340 16,042 24,680 32,084 40,105 64,168 80,210 160,420 and 320,840, with no remainder.
Since 320,840 cannot be divided by just 1 and 320,840, it is not a prime number.