1 (one, unit, unity) is a number, numeral, and glyph. It is the first and smallest positive integer of the infinite sequence of natural numbers.

2025年10月5日 · Tenth century “West Arabic” variation of the Nepali form of Hindu-Arabic numerals (compare Devanagari script १ (1, “éka”)), possibly influenced by Roman numeral Ⅰ, …

The glyph used today in the Western world to represent the number 1, a vertical line, often with a serif at the top and sometimes a short horizontal line at the bottom, traces its roots back to the …

Learn about the number 1. Learn the different ways number 1 can be represented. See the number one on a number line, five frame, ten frame, numeral, word, dice, dominoes, tally mark,...

The number 1 symbolized unity and the origin of all things, since all other numbers can be created from 1 by adding enough copies of it. For example, 7 = 1 + 1 + 1 + 1 + 1 + 1 + 1.

Your guide to the number 1, an odd number which is uniquely neither prime nor composite. Mathematical info, prime factorization, fun facts and numerical data for STEM, education and fun.

1 is the Hindu-Arabic numeral for the number one (the unit). It is the smallest positive integer, and smallest natural number. 1 is the multiplicative identity, i.e. any number multiplied by 1 equals …

2025年9月29日 · Although the number 1 used to be considered a prime number, it requires special treatment in so many definitions and applications involving primes greater than or …

One is a number in Mathematics that represents the quantity or the value of 1. While counting, the number 1 is succeeded by 2 which is then succeeded by 3 and so on. Before learning some …

"1." Vocabulary.com Dictionary, Vocabulary.com, https://www.vocabulary.com/dictionary/1. Accessed 25 Aug. 2025. loading examples...