Prakash was born in Adoor on 24 May 1952 to N. Kunjuraman and V. M. Vilasini. He studied at the Sree Narayana College, Chempazhanthy and The Kerala Law Academy Law College, Thiruvananthapuram and graduated with a B.A. and LL.B. He's married to Jayasree and the couple has three children.
