Q: Is 321,620 a Prime Number?
A: No, 321,620 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 321620 can be evenly divided by 1 2 4 5 10 13 20 26 52 65 130 260 1,237 2,474 4,948 6,185 12,370 16,081 24,740 32,162 64,324 80,405 160,810 and 321,620, with no remainder.
Since 321,620 cannot be divided by just 1 and 321,620, it is not a prime number.