2400 including the newly added essay
ETA: Most colleges will accept scores above 1000.
1500 is a very good score. It is an average.
Some students in my class got a 1500 and they are in the top 5 of our class.
SATs don't rank your intelligence accurately as some people are not as good at taking tests as they are with everything else.
Also, today, many many colleges don't weigh your SAT score as heavily. They focus more on your social and community activities, what you do as extra-curricular activities and if you maintain a consistant score throughout high school.