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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. This fundamental property has led to its unique uses in other …

  2. 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 one men …

  3. 1 (number) - New World Encyclopedia

    1 (one) is a number, numeral, and the glyph that represents the number. It represents a single entity and is commonly regarded as the fundamental unit of counting and measurement. For example, a line …

  4. 1 -- from Wolfram MathWorld

    Dec 22, 2025 · The number one (1), also called "unity," is the first positive integer. It is an odd number. Although the number 1 used to be considered a prime number, it requires special treatment in so …

  5. 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! A …

  6. 1 - Wiktionary, the free dictionary

    Dec 9, 2025 · 1 (previous 0, next 2) The cardinal number one, a single thing or unit. A digit in decimal and every other base numbering system, including binary, octal, and hexadecimal. 15 × 134 = 2010 …

  7. 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 itself, …

  8. 1 Definition & Meaning - Merriam-Webster

    The meaning of ONE is being a single unit or thing. How to use one in a sentence. Using One as a Pronoun: Usage Guide