After reviewing the song i was able to hear the progression 1-5-6-4-1. I could also hear from the 6 it moves to the 2 where there is a chromatic walk from the 2-3 to the 4 and walked back from the 4-3-2 to the 1.
" walked back from 4-3-2-1" . What number dont you here but your ears are pulling you towards it
what I am hearing is 1-5-6-4 then using 2-5 to get back to the 1
My answer is the "5"
I agree with Gemini47 I don't actually hear the 5 but it does seem it does seem to want to resolve there. Gemini47 i hope we are right.