1615
1615 is the year the second part of Don Quixote was published.
- Odd
- Composite
Why 1615 is special
Cervantes wrote it partly in response to an unauthorised sequel by another author, and characters in his version discuss the fake — one of the earliest instances of a novel commenting on its own reception.
Factors & digit properties
- Divisors (8)
- 1, 5, 17, 19, 85, 95, 323, 1615
- Prime factorisation
- 5 × 17 × 19
- Digit sum
- 13
- Digital root
- 4
Representations
- Decimal
- 1615
- Binary
- 11001001111
- Octal
- 3117
- Hexadecimal
- 64f
- Roman numeral
- MDCXV
- Scientific notation
- 1.615 × 10^3
Other mathematical patterns
- Deficient number
Culture
An unauthorised Don Quixote sequel appeared in 1614, and Cervantes's own second part has characters encounter and dispute it. Metafiction of that kind is usually dated far later.
DocumentedCultureGeography: SpainPeriod: 1615
Common questions
Is 1615 a prime number?
No, 1615 is not prime.
What are the factors of 1615?
The factors of 1615 are 1, 5, 17, 19, 85, 95, 323, 1615.
What is 1615 in Roman numerals?
1615 in Roman numerals is MDCXV.
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