Q: Is 321,760 a Prime Number?
A: No, 321,760 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 321760 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 80 160 2,011 4,022 8,044 10,055 16,088 20,110 32,176 40,220 64,352 80,440 160,880 and 321,760, with no remainder.
Since 321,760 cannot be divided by just 1 and 321,760, it is not a prime number.