It is a sampoorna rāgam – scale having all 7 swarams. The notes are chatushruti rishabham, sadharana gandharam, shuddha madhyamam, chatushruti dhaivatam and kaisiki Nishadam. Its ārohaṇa-avarohaṇa structure is as follows (see swaras in Carnatic music for details on below notation and terms): The mnemonic phrase is sa ri gi ma pa dhi ni.
It could be speculated that this was a reason why Saint Tyagaraja revived this dying ancient raga in the 18th Century and breathed new life into it by creating many compositions in this raga. The story of Rama killing the Khara demon is narrated in the 28th, 29th and the 30th sub-chapter of the Aranya Khanda of Ramayana. The word Kharaharapriya may also mean the beloved of the killer of the Khara demon (Khara - Khara demon, Hara - Defeater/Killer, Priya - Beloved).
One of the most popular beliefs is that the ragam was initially called Samaganam and when Ravana was trapped by Shiva, under the kailash hill trying to lift it, it is believed that, to appease the lord, Ravana sang many hymns in praise of the lord, but his heart cooled only when a hymn was sung in the ragam and hence the name ( hara) shiva and ( priya) loved hence "Harapriya " - The one dear to Shiva, and to fit it in the Katapayadi system according to the melakarta chakra system. There are many theories behind the etymology of the name Kharaharapriya.