how to condition inequality of object properties

I need condition to be true only if all properties of the object (variables) are not equal to each other. How can I condition object properties' inequality in a more optimal way? If the number of them grows the combination of obj[1]!=obj[2] and so on will grow enormously

var obj = {
                1: linksArray[randomNumber],
                2: linksArray[randomNumber2],
                3: linksArray[randomNumber3]
            } 
                    
            if(obj[1]!=obj[2] && obj[1]!=obj[3] &&
                obj[2]!=obj[3] && obj[2]!=obj[1] &&
                obj[3]!=obj[2] && obj[3]!=obj[1]
                ) {
                    arr.push(linksArray[randomNumber]);
                    arr.push(linksArray[randomNumber2]);
                    arr.push(linksArray[randomNumber3]);
                    break;
                }