Q: Is 320,000 a Prime Number?
A: No, 320,000 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 320000 can be evenly divided by 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 128 160 200 250 256 320 400 500 512 625 640 800 1,000 1,250 1,280 1,600 2,000 2,500 2,560 3,200 4,000 5,000 6,400 8,000 10,000 12,800 16,000 20,000 32,000 40,000 64,000 80,000 160,000 and 320,000, with no remainder.
Since 320,000 cannot be divided by just 1 and 320,000, it is not a prime number.