1 in Binary, Roman numerals, Hexadecimal & More

The number 1 is 1 in binary, I in Roman numerals, 1 in hexadecimal and 1 in octal.

1 decimal = 1 binary

1 in every number system

SystemWritten as
Binary (base 2)1
Roman numeralsI
Hexadecimal (base 16)1
Octal (base 8)1
Duodecimal (base 12)1
Ternary (base 3)1
Base 361
Vigesimal (base 20)1
Quaternary (base 4)1
Quinary (base 5)1
Senary (base 6)1

About the number 1

  • 1 is an odd number.
  • 1 is a power of two: 20.
  • Written in binary it needs 1 bit, so it fits in one byte.

Nearby numbers in decimal