A megahertz is one million (or 106) hertz.
See hertz, kilohertz (one thousand hertz), gigahertz[?] (109 hertz), terahertz[?] (1012 hertz), and petahertz[?] (1015 hertz).
... are 90.1 males. The median income for a household in the town is $44,583, and the median income for a family is $52,500. Males have a median income of $47,917 versus ...