112
112 is the single emergency telephone number across the European Union and several other countries.
- Even
- Composite
Where 112 fits
Why 112 is special
112's importance is entirely practical and regulatory: EU member states are required to support it as a universal emergency number alongside any pre-existing national ones, making it one of the most consequential three-digit numbers for public safety in Europe.
Factors & digit properties
- Divisors (10)
- 1, 2, 4, 7, 8, 14, 16, 28, 56, 112
- Prime factorisation
- 2^4 × 7
- Digit sum
- 4
- Digital root
- 4
Representations
- Decimal
- 112
- Binary
- 1110000
- Octal
- 160
- Hexadecimal
- 70
- Roman numeral
- CXII
- Scientific notation
- 1.120 × 10^2
Other mathematical patterns
- Abundant number
- Harshad (Niven) number
Law & regulation
112 is mandated as a universal emergency number across European Union member states (alongside any pre-existing national emergency numbers), per EU telecommunications regulation.
DocumentedLaw & regulationGeography: European Union112 is mandated as a universal emergency number across European Union member states (alongside any pre-existing national emergency numbers), per EU telecommunications regulation.
DocumentedLaw & regulationGeography: European Union
Common questions
Is 112 a prime number?
No, 112 is not prime.
What are the factors of 112?
The factors of 112 are 1, 2, 4, 7, 8, 14, 16, 28, 56, 112.
What is 112 in Roman numerals?
112 in Roman numerals is CXII.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026