Allahabad also known as Prayag, is a city in the north Indian state of Uttar Pradesh in India. It is the administrative headquarters of the Allahabad District. Allahabad is the seventh most populous city in Uttar Pradesh, with an estimated population of 1.74 million living in the city and district area. In 2011, it was ranked the world's 130th fastest growing city. Allahabad is also known as the "city of prime ministers" because post independence seven out of 13 prime minister of India belonged to Allahabad (Jawaharlal Nehru, Lal Bahadur Shastri, Indira Gandhi, Rajiv Gandhi, Gulzarilal Nanda, Vishwanath Pratap Singh and Chandra Shekhar). All these seven leaders were either born in Allahabad, were alumni of Allahabad University, or were elected from a constituency in Allahabad.