Q: Is 12,400 a Prime Number?
A: No, 12,400 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 12400 can be evenly divided by 1 2 4 5 8 10 16 20 25 31 40 50 62 80 100 124 155 200 248 310 400 496 620 775 1,240 1,550 2,480 3,100 6,200 and 12,400, with no remainder.
Since 12,400 cannot be divided by just 1 and 12,400, it is not a prime number.