CXXVI

CXXVI is the Roman numeral for the number 126. It is formed by combining C (100) with XX (20) and VI (6), giving 100 + 20 + 6 = 126. In standard Roman numerals, this additive form is typical when no subtractive pair is required.

The numeral appears in historical contexts to denote a year, a sequence position, or an item in a numbered list, and it is still used today in certain settings that employ Roman numbering for chapters, volumes, monarchs, or page markers.

In mathematics, the decimal number 126 has a prime factorization of 2 × 3^2 × 7. It is also the value of the binomial coefficient "9 choose 4" (and equivalently "9 choose 5"), a standard quantity in combinatorics.

Beyond pure numerals, CXXVI as a string can serve as a designation in catalogs, models, or inscriptions where Roman numerals are preferred for stylistic or historical reasons. While its use is largely contextual, CXXVI remains one of the many Roman numeral representations that persist in modern notation and historical dating alike.