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.
Same number, different meanings
How 1445 is understood across different contexts — never implying one meaning because of another.
- Mathematics
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.
- History
In 1445, Portuguese ships reached the Senegal river and Cape Verde (Portugal).
- 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.
1445 is part of
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
- Scientific notation
- 1.445 × 10^3
Roman numerals
M C D X L V
MCDXLV uses the subtractive pair XL: ten before fifty — fifty minus ten.
Binary
1 0 1 1 0 1 0 0 1 0 1
1 × 1,024 + 0 × 512 + 1 × 256 + 1 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 1 × 1 = 1,445
Octal
2 6 4 5
2 × 512 + 6 × 64 + 4 × 8 + 5 × 1 = 1,445
Hexadecimal
5 a 5
5 × 256 + a × 16 + 5 × 1 = 1,445
Read as powers of two: 1,024 + 256 + 128 + 32 + 4 + 1 = 1,445.
In historical numeral systems
Egyptian
1 lotus, 4 coils of rope, 4 hobbles, 5 strokes
1 × 1,000 + 4 × 100 + 4 × 10 + 5 × 1 = 1,445. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges + 4 vertical wedges (sixties place), 5 vertical wedges (units place)
24 × 60 + 5 = 1445. Places are separated by a space on the tablet, with the higher place written first.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Deficient number
Related numbers & connections
1445 is a year in the 15th century, in the 1440s.
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 →Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
Other connections
- developed from1457
why?
Strength 0.50, confidence "high".
History
In 1445, Portuguese ships reached the Senegal river and Cape Verde (Portugal).
DocumentedHistoryGeography: PortugalPeriod: 1445
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. XL is subtractive: ten before fifty — fifty minus ten. Written additively it would be MCCCCXXXXV, which Roman inscriptions used freely — the strict subtractive form is a later convention.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026