Q: Is 720,538 a Prime Number?
A: No, 720,538 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 720538 can be evenly divided by 1 2 7 13 14 26 37 74 91 107 182 214 259 481 518 749 962 1,391 1,498 2,782 3,367 3,959 6,734 7,918 9,737 19,474 27,713 51,467 55,426 102,934 360,269 and 720,538, with no remainder.
Since 720,538 cannot be divided by just 1 and 720,538, it is not a prime number.