Querying number of subscription to each publication
I was able to get the necessary info I needed by poking around a bit:

use Distribution; 
select count(s.publisher_id) as 'Number of Subscribers', p.publication_id, p.Publisher_db, p.publication from MSpublications p
    left outer join MSmerge_subscriptions s on p.publication_id = s.publication_id

 group by p.publication_id, p.publisher_db, p.publication
 Order by Publisher_db, Publication_id asc