A megahertz is one million (or 106) hertz.
See hertz, kilohertz (one thousand hertz), gigahertz[?] (109 hertz), terahertz[?] (1012 hertz), and petahertz[?] (1015 hertz).
... together, 11.9% have a female householder with no husband present, and 42.6% are non-families. 36.3% of all households are made up of individuals and 17.6% have someone ...