select two values from table and insert in one column

Question

Need select two values from table and insert in one column all need to be text

Need to be this type in 1 column

"Document name -count number - Company"

 

201 ULAZNI RACUN OSTALO -(max(number)) - (select company from dbo.partnert))

201 ULAZNI RACUN OSTALO' + (max(number)) + (select company from dbo.partner))

I try this but error is 

 

Conversion failed when converting the varchar value '201 ULAZNI RACUN OSTALO -' to data type int.