Riddle

A safe of a treasure chest can be unlocked with a 5 digit key. The following is known about it: The 4th digit is 4 greater than the 2nd digit, while the 3rd digit is 3 less than the 2nd digit. The 1st digit is thrice the last digit. There are 3 pairs whose sum is 11. What is the 5 digit number to get in?