The word "459" appears to be a numeral rather than a standard English word. However, if we consider the context it might relate to, "459" could represent a range of meanings, including a numerical identifier in various systems or codes. For instance, in the context of criminal codes in some jurisdictions, "459" may refer to burglary.
The numeral "459" is composed of the digits 4, 5, and 9. These digits themselves do not have etymological roots in the traditional sense as words do; they are figures in the base-10 (decimal) number system.