The number 1

Representation numerals

Greek numeral: αʹ

Arabic numeral: ١

Roman numeral: I

Numeral systems

Binary: 1

Septimal (base 7): 1

Octal: 1

Hexadecimal: 1

Characteristics

1 is a Fibonacci number

1 is a triangular number
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The next triangular is: 3

1 is a pentagonal number

1 is a hexagonal number

1 is a heptagonal number

1 is a octogonal number

Related primes

The 1st prime number is: 2

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