Nombre

1

1 — One

1 is odd, a calendar year.

One is the multiplicative identity. It is the only positive integer that is neither prime nor composite, and is the first and second number in the Fibonacci sequence.

Sources https://en.wikipedia.org/wiki/1

Catalan Number Curated Deficient Number Factorial Fibonacci Flippable Happy Number Harshad / Niven Heptagonal Hexagonal Kaprekar Number Lucas Narcissistic / Armstrong Octagonal Pentagonal Perfect Cube Perfect Square Power of Ten Power of Two Recamán's Sequence Repunit Strobogrammatic Triangular

Propriétés

Parité: Impair
Nombre de chiffres: 1
Somme des chiffres: 1
Racine numérique: 1
Palindrome: Oui
Suite de Recamán: a(1) = 1
Nombre de diviseurs: 1
σ(n) — somme des diviseurs: 1

Diviseurs et multiples

All divisors (1)

Aliquot sum (sum of proper divisors): 0

Factor pairs (a × b = 1)

1 × 1

First multiples

1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10

Représentations

En lettres: one
Ordinal: 1st
Chiffre romain: I
Binaire: 1
Octal: 1
Hexadécimal: 0x1
Base64: AQ==

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ASCII character

As an ASCII codepoint, 1 is control character (0x01). ASCII control character.

Hex color

#000001

RGB(0, 0, 1)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.1.

Address: 0.0.0.1
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.1

Unspecified address (0.0.0.0/8) — "this network" placeholder.