- 1 - 维基百科，自由的百科全书
在数学中，1为乘法单位元，即任何数字与1相乘皆等于其本身。 按照惯例，1不被视为素数。 在数字电路中，1表示 二进制 中的“开启”状态，是计算技术的基础。 在 哲学 领域，1在诸多传统中象征着终极现实或存在的本源。
- 1（自然数之一）_百度百科
1，是一个阿拉伯数字。 1是一个自然数，是最小的正整数，是最小的正奇数。 1是一个有理数，是一位数，也是奇数。 1既不是质数也不是合数。 1的n次方（n∈R）都等于1。 1的倒数是它本身。 一个或者几个事物所组成的整体，可以看作是单位“1”。
- 1 - 维基词典，自由的多语言词典
(語音學，通常上標) 音調，根據當地的習慣，可以是高的，也可以是低的；‘1’是最常見的最高音或最低音（參見0） 近義詞： ˥ 、 ˩
- 1 (number) - New World Encyclopedia
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 Indians, who wrote 1 as a horizontal line, as is still the case in Chinese script
- 1 (number) | Math Wiki | Fandom
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 itself, for example: a ⋅ 1 = a {\displaystyle a \cdot 1=a} and 1 × a = a {\displaystyle 1\times
- Number 1 - Facts about the integer - Numbermatics
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 (Number)
In scientific notation, it is written as 1 × 10 0 It has a total of 0 prime factors and 1 positive divisors There is one positive integer (up to 1) that is relatively prime to 1 The prime factorization of 1 is 1 Since it has a total of 0 prime factors, 1 is a composite number
- 1 - Wikipedia
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
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