427
427 is the displacement of the most sought-after big blocks.
- Odd
- Composite
Where 427 fits
Why 427 is special
Both Chevrolet and Ford built 427 engines, and the coincidence of displacement between rivals is a consequence of a 7-litre racing class limit.
Factors & digit properties
- Divisors (4)
- 1, 7, 61, 427
- Prime factorisation
- 7 × 61
- Digit sum
- 13
- Digital root
- 4
Representations
- Decimal
- 427
- Binary
- 110101011
- Octal
- 653
- Hexadecimal
- 1ab
- Roman numeral
- CDXXVII
- Scientific notation
- 4.270 × 10^2
Other mathematical patterns
- Deficient number
- Semiprime
- Lucky number (mathematical sieve)
Related numbers & connections
American engines were identified by cubic inch displacement, so a number rather than a name names them.
View 454 →Ford built both, one for racing categories near a seven-litre limit and one compact enough for a Cobra.
View 289 →Technology & computing
Chevrolet and Ford both produced 427 cubic inch V8 engines, a size close to the 7-litre limit applied in several racing categories of the period.
DocumentedTechnology & computingGeography: United StatesPeriod: 1963–
Common questions
Is 427 a prime number?
No, 427 is not prime.
What are the factors of 427?
The factors of 427 are 1, 7, 61, 427.
What is 427 in Roman numerals?
427 in Roman numerals is CDXXVII.
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