Q: Is 503,125 a Prime Number?
A: No, 503,125 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 503125 can be evenly divided by 1 5 7 23 25 35 115 125 161 175 575 625 805 875 2,875 3,125 4,025 4,375 14,375 20,125 21,875 71,875 100,625 and 503,125, with no remainder.
Since 503,125 cannot be divided by just 1 and 503,125, it is not a prime number.