What is 1 mega eV equal to?

Could you please clarify what you mean by "1 mega eV"? Are you referring to a unit of energy commonly used in particle physics and nuclear physics? If so, then 1 mega eV, abbreviated as 1 MeV, is equal to one million electron volts (eV). Specifically, it's equal to 1.602176634×10^-13 joules (J), which is the SI unit for energy. This unit is often used to describe the energy of particles such as electrons, protons, and neutrons, as well as the energy released in nuclear reactions. Do you have any further questions about this unit or its applications?