Back 1 (ахыԥхьаӡара) Abkhazian 1 (getal) Afrikaans አንድ Amharic Cecay AMI 1 ANG 1 (عدد) Arabic 1 (ܡܢܝܢܐ) ARC 1 ARY 1 ARZ ১ Assamese
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|---|---|---|---|---|
| Cardinal | one, unit, unity | |||
| Ordinal | 1st (first) | |||
| Numeral system | unary | |||
| Factorization | 1 | |||
| Divisors | 1 | |||
| Greek numeral | Α´ | |||
| Roman numeral | I | |||
| Roman numeral (unicode) | Ⅰ, ⅰ | |||
| Greek prefix | mono- /haplo- | |||
| Latin prefix | uni- | |||
| Binary | 12 | |||
| Ternary | 13 | |||
| Quaternary | 14 | |||
| Quinary | 15 | |||
| Senary | 16 | |||
| Octal | 18 | |||
| Duodecimal | 112 | |||
| Hexadecimal | 116 | |||
| Vigesimal | 120 | |||
| Base 36 | 136 | |||
| Greek numeral | α' | |||
| Persian | ١ - یک | |||
| Arabic | ١ | |||
| Urdu |  | |||
| Ge'ez | ፩ | |||
| Bengali & Assamese | ১ | |||
| Chinese numeral | 一，弌，壹 | |||
| Korean | 일, 하나 | |||
| Devanāgarī | १ | |||
| Telugu | ೧ | |||
| Tamil | ௧ | |||
| Kannada | ೧ | |||
| Hebrew | א (alef) | |||
| Khmer | ១ | |||
| Thai | ๑ | |||
| Malayalam | ൧ | |||
| Counting rod | 𝍠 | |||
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One (1) is the first natural number, followed by two. The Roman numeral for one is I.