Q: Is 685,725 a Prime Number?
A: No, 685,725 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 685725 can be evenly divided by 1 3 5 15 25 41 75 123 205 223 615 669 1,025 1,115 3,075 3,345 5,575 9,143 16,725 27,429 45,715 137,145 228,575 and 685,725, with no remainder.
Since 685,725 cannot be divided by just 1 and 685,725, it is not a prime number.