Roman numerals are a system of numerical notation based on the ancient Roman system. The symbols are I, V, X, L, C, D, and M, standing respectively for 1, 5, 10, 50, 100, 500, and 1,000 in the Hindu-Arabic numeral system.
Explore the curious properties of number 1, an odd number which is uniquely neither prime nor composite. Includes mathematical info, prime factorization, divisors, bases and much more!