Which university in the US may I get an admission to on full?
If you are an international student, Im afraid you are out of luck here. International admissions are very competitive, and most US colleges are need-aware for international applicants. Why should they provide a free education to an average student? Private colleges can always find the money to support an exceptional student they really want, but 1420 SAT doesnt put you in this category. Sorry to be blunt about it, but its better to get a reality check sooner than later.