1248
1248 is the year construction began on Cologne Cathedral.
- Even
- Composite
Where 1248 fits
Why 1248 is special
Work stopped in 1473 and resumed in 1842, using the original medieval plans that had survived. It was finished in 1880, 632 years after it started.
Factors & digit properties
- Divisors (24)
- 1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 32, 39, 48, 52, 78, 96, 104, 156, 208, 312, 416, 624, 1248
- Prime factorisation
- 2^5 × 3 × 13
- Digit sum
- 15
- Digital root
- 6
Representations
- Decimal
- 1248
- Binary
- 10011100000
- Octal
- 2340
- Hexadecimal
- 4e0
- Roman numeral
- MCCXLVIII
- Scientific notation
- 1.248 × 10^3
Other mathematical patterns
- Abundant number
Related numbers & connections
Notre-Dame began in 1163 and Cologne Cathedral in 1248. Cologne stood unfinished for four centuries and was completed from surviving medieval plans in 1880.
View 1163 →Numbers Around Us
- appears alongside1163
why?
Strength 0.50, confidence "high".
History
Cologne Cathedral stood unfinished for nearly four centuries. The medieval elevation drawings survived, and the nineteenth-century completion followed them, which is why it reads as a single coherent building.
DocumentedHistoryGeography: GermanyPeriod: 1248–1880
Common questions
Is 1248 a prime number?
No, 1248 is not prime.
What are the factors of 1248?
The factors of 1248 are 1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 32, 39, 48, 52, 78, 96, 104, 156, 208, 312, 416, 624, 1248.
What is 1248 in Roman numerals?
1248 in Roman numerals is MCCXLVIII.
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