A safe-breaker is attempting to crack a safe with a 7-combination code. So far they have worked out that:

The first digit is double the third digit
The code is a palindrome (it reads the same if it is reversed)
The fourth number is 7
The third number is one less than the sixth number
The second number is 3 less than the fourth number

Can you advise the safe-breaker on the correct combination?