Q: Is 243,400 a Prime Number?
A: No, 243,400 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 243400 can be evenly divided by 1 2 4 5 8 10 20 25 40 50 100 200 1,217 2,434 4,868 6,085 9,736 12,170 24,340 30,425 48,680 60,850 121,700 and 243,400, with no remainder.
Since 243,400 cannot be divided by just 1 and 243,400, it is not a prime number.