Why select that number to be literal when all around it are considered symbolic?
Regardless. It is a finite number. Not everybody goes to heaven.
How could you represent a finite number symbolically instead of simply revealing the number. Number is also a fraction of the vast majority, etc.
144k = 1M? 144M? 12? unknown?
Also, the number or people is predetermined not so with those on earth, the door is open for everybody.