Q: Is 128,000 a Prime Number?
A: No, 128,000 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 128000 can be evenly divided by 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 128 160 200 250 256 320 400 500 512 640 800 1,000 1,024 1,280 1,600 2,000 2,560 3,200 4,000 5,120 6,400 8,000 12,800 16,000 25,600 32,000 64,000 and 128,000, with no remainder.
Since 128,000 cannot be divided by just 1 and 128,000, it is not a prime number.