1275
IEEE 1275 defines Open Firmware.
- Odd
- Composite
Where 1275 fits
Why 1275 is special
Boot firmware that runs Forth is unusual, and it is why a device could supply a driver that worked before any operating system had loaded.
Same number, different meanings
How 1275 is understood across different contexts — never implying one meaning because of another.
- Mathematics
Boot firmware that runs Forth is unusual, and it is why a device could supply a driver that worked before any operating system had loaded.
- History
In 1275, Marco Polo reached the court of Kublai Khan (China).
- Technology & computing
IEEE 1275 specifies Open Firmware, a boot environment using Forth-based device drivers, used on SPARC, PowerPC Macintosh and OLPC systems.
1275 is part of
Factors & digit properties
- Divisors (12)
- 1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275
- Prime factorisation
- 3 × 5^2 × 17
- Digit sum
- 15
- Digital root
- 6
Representations
- Decimal
- 1275
- Scientific notation
- 1.275 × 10^3
Roman numerals
M C C L X X V
Binary
1 0 0 1 1 1 1 1 0 1 1
1 × 1,024 + 0 × 512 + 0 × 256 + 1 × 128 + 1 × 64 + 1 × 32 + 1 × 16 + 1 × 8 + 0 × 4 + 1 × 2 + 1 × 1 = 1,275
Octal
2 3 7 3
2 × 512 + 3 × 64 + 7 × 8 + 3 × 1 = 1,275
Hexadecimal
4 f b
4 × 256 + f × 16 + b × 1 = 1,275
Read as powers of two: 1,024 + 128 + 64 + 32 + 16 + 8 + 2 + 1 = 1,275.
In historical numeral systems
Egyptian
1 lotus, 2 coils of rope, 7 hobbles, 5 strokes
1 × 1,000 + 2 × 100 + 7 × 10 + 5 × 1 = 1,275. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges + 1 vertical wedge (sixties place), 1 corner wedge + 5 vertical wedges (units place)
21 × 60 + 15 = 1275. 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
- Triangular number
- Deficient number
- Happy number
- Harshad (Niven) number
- Lucky number (mathematical sieve)
Related numbers & connections
1275 is a year in the 13th century, in the 1270s.
Open Firmware and POSIX are both portability layers, one below the operating system and one above it.
View 1003 →Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
Other connections
- is associated with1003
why?
Strength 0.50, confidence "high".
History
In 1275, Marco Polo reached the court of Kublai Khan (China).
DocumentedHistoryGeography: ChinaPeriod: 1275
Technology & computing
IEEE 1275 specifies Open Firmware, a boot environment using Forth-based device drivers, used on SPARC, PowerPC Macintosh and OLPC systems.
DocumentedTechnology & computingGeography: International — IEEEPeriod: 1994–
Common questions
Is 1275 a prime number?
No, 1275 is not prime.
What are the factors of 1275?
The factors of 1275 are 1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275.
What is 1275 in Roman numerals?
1275 in Roman numerals is MCCLXXV.
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