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.

Educational video for children to learn the number 1. The little ones will learn how to trace number 1, how to pronounce it and also how to count with a series of super fun examples.

In mathematics, 0.999... is a repeating decimal that is equal to 1. Many proofs have been made to show this is correct. [2][3] One is important for computer science, because the binary numeral …

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 …

Jul 18, 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 days ago · 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 …

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

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 …

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 Add to list Definitions of 1 noun the smallest whole number or a numeral representing this number synonyms: I, ace, one, single, unity