Kathmandu is the capital and, with more than one million inhabitants, the largest metropolitan city of Nepal. The city is the urban core of the Kathmandu Valley in the Himalayas, which contains two sister cities: Lalitpur (Patan), 5 kilometres (3.1 mi) to its south and Bhaktapur or Bhadgaon, 12 kilometres (7.5 mi) to its east, and a number of smaller towns. It is also acronymed as 'KTM' and named 'tri-city'. In the last census (2001), the city of Kathmandu had 671,846 inhabitants. Population estimates for 2005 were 790,612 for 2010 they stood at 989,273 and 2012 at 1,006,656 The municipal area is (50.67 square kilometres (19.56 sq mi)) and the population density is 19,500 per km².