5245
RFC 5245 was the original ICE specification.
- Odd
- Composite
Where 5245 fits
Why 5245 is special
It was replaced after a decade because its aggressive nomination mode proved unnecessary and its state machine was widely misimplemented.
5245 is part of
Factors & digit properties
- Divisors (4)
- 1, 5, 1049, 5245
- Prime factorisation
- 5 × 1049
- Digit sum
- 16
- Digital root
- 7
Representations
- Decimal
- 5245
- Binary
- 1010001111101
- Octal
- 12175
- Hexadecimal
- 147d
- Scientific notation
- 5.245 × 10^3
Other mathematical patterns
- Deficient number
- Happy number
- Semiprime
Related numbers & connections
ICE was respecified after its original state machine proved too complicated to implement consistently.
View 8445 →Technology & computing
RFC 5245 specified the first version of ICE. It was obsoleted by RFC 8445, which removed aggressive nomination and simplified the checking procedure.
DocumentedTechnology & computingGeography: International — IETFPeriod: 2010
Common questions
Is 5245 a prime number?
No, 5245 is not prime.
What are the factors of 5245?
The factors of 5245 are 1, 5, 1049, 5245.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 3 August 2026