Q: Is 321,400 a Prime Number?
A: No, 321,400 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 321400 can be evenly divided by 1 2 4 5 8 10 20 25 40 50 100 200 1,607 3,214 6,428 8,035 12,856 16,070 32,140 40,175 64,280 80,350 160,700 and 321,400, with no remainder.
Since 321,400 cannot be divided by just 1 and 321,400, it is not a prime number.