A megahertz is one million (or 106) hertz.
See hertz, kilohertz (one thousand hertz), gigahertz[?] (109 hertz), terahertz[?] (1012 hertz), and petahertz[?] (1015 hertz).
... Noam Chomsky conducted by David Barsamian[?]. It was first published in the UK by Pluto Press[?] in 1996. The contents runs as follows: Introduction Looking ...