About

1 is the natural number exceeding 0 and preceding 2, the Hindu-Arabic numeral for the number one (the unit).

Properties

• 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: ${\displaystyle a \cdot 1=a}$ and ${\displaystyle 1\times a=a}$.
• 1 is the 1st triangular number and the first square number.
• The codepoint for this character is U+0031 DIGIT ONE.
• 1 is the only natural number that is neither prime nor composite.
• 1 is a divisor of any integer.
• Not only that, but if you do ${\displaystyle 1[x>1]1}$, it will always equal 1.
• 1 is the only odd practical number.
• 1 can't be used as the base nor the argument of logarithms.
• 1 is also the first natural number.
• 1 is the first number to be a cube and a tesseract simultaneously:
  • Numbers like this have the form: n¹².
  • The next is not until 4096, and the rest exceed 100 thousand.
  • All tesseract numbers are square numbers.
• 1 is not prime, nor composite. It is one of only 2 numbers with this property, the other being 0.

Times Table

1 x 1 = 1

2 x 1 = 2

3 x 1 = 3

4 x 1 = 4

5 x 1 = 5

6 x 1 = 6

7 x 1 = 7

8 x 1 = 8

9 x 1 = 9

10 x 1 = 10

11 x 1 = 11

12 x 1 = 12

Significance

• Humans have one nose.
• Humans have one mouth.