1 Cardinal 1 one Ordinal 1st first Numeral system unary Factorization 1 Divisors 1 Greek numeral α' Roman numeral I Roman numeral (Unicode) Ⅰ, ⅰ Arabic ١ Ge'ez ፩ Bengali ১ Chinese numeral 一，弌，壹 Korean 일, 하나 Devanāgarī १ Hebrew א (Alef) Khmer ១ Thai ๑ prefixes / (from Greek)(from Lat… (More on One)