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.

One (1) is the first natural number, followed by two. The Roman numeral for one is I. In mathematics, the number one is the multiplicative identity. [1] . It is also the only number for …

In mathematics, the number 1 is the natural number [1] that follows 0 and precedes 2. It is an integer and a cardinal number, that is, a number that is used for counting. [2] . In addition, it is …

Jun 20, 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. …

Jun 18, 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 …

May 12, 2023 · The number 1 is the smallest positive integer representing unity and singularity in mathematics. It symbolizes independence, creativity, and leadership in many cultures and is …

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 …

Explore the beginning and masculine character of the number 1, recognized as the first of all numbers in various languages.

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

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.