Q: Is 625,000 a Prime Number?
A: No, 625,000 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 625000 can be evenly divided by 1 2 4 5 8 10 20 25 40 50 100 125 200 250 500 625 1,000 1,250 2,500 3,125 5,000 6,250 12,500 15,625 25,000 31,250 62,500 78,125 125,000 156,250 312,500 and 625,000, with no remainder.
Since 625,000 cannot be divided by just 1 and 625,000, it is not a prime number.