1582
1582 is the year the Gregorian calendar was introduced.
- Even
- Composite
Where 1582 fits
Why 1582 is special
Ten days were removed from October to correct the drift that had accumulated under the Julian calendar. Catholic countries adopted it immediately, Protestant and Orthodox ones took centuries, and for a long stretch of European history the date depended on which country you were standing in.
1582 is part of
Factors & digit properties
- Divisors (8)
- 1, 2, 7, 14, 113, 226, 791, 1582
- Prime factorisation
- 2 × 7 × 113
- Digit sum
- 16
- Digital root
- 7
Representations
- Decimal
- 1582
- Binary
- 11000101110
- Octal
- 3056
- Hexadecimal
- 62e
- Roman numeral
- MDLXXXII
- Scientific notation
- 1.582 × 10^3
Other mathematical patterns
- Deficient number
- Happy number
Related numbers & connections
The Gregorian reform of 1582 was an adjustment to the remainder a 365-day calendar leaves behind.
View 365 →Science
The Gregorian reform deleted ten days to correct accumulated Julian drift. Catholic states adopted it at once and Protestant and Orthodox ones took centuries, so for a long period the date genuinely depended on which country you were standing in — a real problem for dating correspondence and contracts.
DocumentedSciencePeriod: 1582
Common questions
Is 1582 a prime number?
No, 1582 is not prime.
What are the factors of 1582?
The factors of 1582 are 1, 2, 7, 14, 113, 226, 791, 1582.
What is 1582 in Roman numerals?
1582 in Roman numerals is MDLXXXII.
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