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  1. 1 - Wikipedia

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

  2. 1 - Wiktionary, the free dictionary

    Dec 9, 2025 · 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, both …

  3. The number one - Britannica

    Other articles where the number one is discussed: Middle Eastern religion: Association of religion with the arts and sciences: The most perfect number was one, for by advancing from zero to …

  4. 1 (number) - New World Encyclopedia

    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 …

  5. 1 (number) | Math Wiki | Fandom

    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 …

  6. 1 Definition & Meaning - Merriam-Webster

    One John Doe made a speech. "Puma" and "cougar" are different names for one animal. The author and the main character are one and the same. : the first whole number above zero see …

  7. Number 1 - Curious Math Facts and Interesting Properties

    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!

  8. 1 -- from Wolfram MathWorld

    Dec 22, 2025 · 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 equal to 2 …

  9. What does 1 mean? - Definitions.net

    1 (one, also called unit, unity, and (multiplicative) identity) is a number, and a numerical digit used to represent that number in numerals. It represents a single entity, the unit of counting or …

  10. What Is 1? Definition, Facts & Examples for Kids - Vedantu

    Discover what the number 1 means with fun examples. Learn how to write 1 in words and boost your maths skills with Vedantu!