IMO, you should be trying to distinguish yourself from all the other "perfect math sat scorers" by writing stellar essays, earning glowing and detailed recommendations, and participating in unique activities that interest you. You have no idea how many people do DECA, FBLA, or try to start up an internet company, just because they think they will be shoe-ins for a business school.
Regardless, here are some stats provided by BusinessWeek's evaluation of Wharton admissions...
Secondary School Record:
Very Important
Class Rank:
Considered
Talent/Ability:
Very Important
Interview:
Considered
Extracurricular Activities:
Important
Volunteer Work:
Considered
Character/Personal Abilities:
Very Important
Application Essay:
Important
Work Experience:
Considered
SAT/ACT Scores:
Important
Recommendations:
Very Important
High School GPA:
Very Important
University of Pennsylvania: Undergraduate Profile BusinessWeek
College Board also provides insight into general admissions at Penn:
College Search - University of Pennsylvania - Penn - Admission