Q: Is 321,580 a Prime Number?
A: No, 321,580 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 321580 can be evenly divided by 1 2 4 5 7 10 14 20 28 35 70 140 2,297 4,594 9,188 11,485 16,079 22,970 32,158 45,940 64,316 80,395 160,790 and 321,580, with no remainder.
Since 321,580 cannot be divided by just 1 and 321,580, it is not a prime number.