Q: Is 543,125 a Prime Number?
A: No, 543,125 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 543125 can be evenly divided by 1 5 11 25 55 79 125 275 395 625 869 1,375 1,975 4,345 6,875 9,875 21,725 49,375 108,625 and 543,125, with no remainder.
Since 543,125 cannot be divided by just 1 and 543,125, it is not a prime number.