1258
1258 is the year Baghdad fell to the Mongols.
- Even
- Composite
Where 1258 fits
Why 1258 is special
The House of Wisdom, one of the great libraries of the medieval world, was destroyed. The loss is often given as an endpoint for the Islamic Golden Age, though historians argue the decline was already under way.
1258 is part of
Factors & digit properties
- Divisors (8)
- 1, 2, 17, 34, 37, 74, 629, 1258
- Prime factorisation
- 2 × 17 × 37
- Digit sum
- 16
- Digital root
- 7
Representations
- Decimal
- 1258
- Binary
- 10011101010
- Octal
- 2352
- Hexadecimal
- 4ea
- Roman numeral
- MCCLVIII
- Scientific notation
- 1.258 × 10^3
Other mathematical patterns
- Deficient number
- Happy number
Related numbers & connections
The Mongol confederation formed in 1206 and took Baghdad in 1258. Fifty years separate a union of steppe tribes from the sack of the largest city in the Islamic world.
View 1206 →History
The destruction of Baghdad and its libraries in 1258 is conventionally the end of the Islamic Golden Age. Scholarship increasingly treats it as a severe blow to a period already changing rather than a single terminal event.
DocumentedHistoryGeography: BaghdadPeriod: 1258
Common questions
Is 1258 a prime number?
No, 1258 is not prime.
What are the factors of 1258?
The factors of 1258 are 1, 2, 17, 34, 37, 74, 629, 1258.
What is 1258 in Roman numerals?
1258 in Roman numerals is MCCLVIII.
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