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  1. 1 - Wikipedia

    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.

  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 ultimately …

  3. 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 Indians, who …

  4. 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!

  5. 1 - definition of 1 by The Free Dictionary

    Noun 1. 1 - the smallest whole number or a numeral representing this number; "he has the one but will need a two and three to go with it"; "they had lunch...

  6. The number one - Britannica

    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.

  7. 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 measurement.

  8. 1 -- from Wolfram MathWorld

    Dec 3, 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 that it is …

  9. Properties of the number 1 - numberempire.com

    Properties of the number 1: factors, prime check, fibonacci check, bell number check, binary, octal, hexadecimal representations and more.

  10. 1 (Number)

    In scientific notation, it is written as 1 × 10 0. It has a total of 0 prime factors and 1 positive divisors. There is one positive integer (up to 1) that is relatively prime to 1. The prime factorization of 1 is 1. …