1445
1445 is the approximate year of the Gutenberg Bible's production start.
- Odd
- Composite
Where 1445 fits
Why 1445 is special
About 180 copies were made and 49 survive. It was priced well above a manuscript labourer's annual wage, so printing did not immediately make books cheap.
Factors & digit properties
- Divisors (6)
- 1, 5, 17, 85, 289, 1445
- Prime factorisation
- 5 × 17^2
- Digit sum
- 14
- Digital root
- 5
Representations
- Decimal
- 1445
- Binary
- 10110100101
- Octal
- 2645
- Hexadecimal
- 5a5
- Roman numeral
- MCDXLV
- Scientific notation
- 1.445 × 10^3
Other mathematical patterns
- Deficient number
Related numbers & connections
The Gutenberg Bible from around 1445 carries no printer's name or date; the Mainz Psalter of 1457 carries both, and is the first printed book that says who made it.
View 1457 →Other connections
- developed from1457
why?
Strength 0.50, confidence "high".
Technology & computing
The Gutenberg Bible cost about three years of a clerk's wages. Printing reduced the cost of books over decades rather than at a stroke, and the first products were luxury goods.
DocumentedTechnology & computingGeography: MainzPeriod: around 1445–1455
Common questions
Is 1445 a prime number?
No, 1445 is not prime.
What are the factors of 1445?
The factors of 1445 are 1, 5, 17, 85, 289, 1445.
What is 1445 in Roman numerals?
1445 in Roman numerals is MCDXLV.
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