1173
1173 is a year in the 12th century. The campanile at Pisa began to lean during construction, and work stopped for a century (Italy).
- Odd
- Composite
Where 1173 fits
Why 1173 is special
1173 has a profile because of what happened in it rather than because of any property of the number: the campanile at Pisa began to lean during construction, and work stopped for a century (Italy).
1173 is part of
Factors & digit properties
- Divisors (8)
- 1, 3, 17, 23, 51, 69, 391, 1173
- Prime factorisation
- 3 × 17 × 23
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 1173
- Scientific notation
- 1.173 × 10^3
Roman numerals
M C L X X I I I
Binary
1 0 0 1 0 0 1 0 1 0 1
1 × 1,024 + 0 × 512 + 0 × 256 + 1 × 128 + 0 × 64 + 0 × 32 + 1 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 1 × 1 = 1,173
Octal
2 2 2 5
2 × 512 + 2 × 64 + 2 × 8 + 5 × 1 = 1,173
Hexadecimal
4 9 5
4 × 256 + 9 × 16 + 5 × 1 = 1,173
Read as powers of two: 1,024 + 128 + 16 + 4 + 1 = 1,173.
In historical numeral systems
Egyptian
1 lotus, 1 coil of rope, 7 hobbles, 3 strokes
1 × 1,000 + 1 × 100 + 7 × 10 + 3 × 1 = 1,173. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 9 vertical wedges (sixties place), 3 corner wedges + 3 vertical wedges (units place)
19 × 60 + 33 = 1173. 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
1173 is a year in the 12th century, in the 1170s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
History
In 1173, the campanile at Pisa began to lean during construction, and work stopped for a century (Italy).
DocumentedHistoryGeography: ItalyPeriod: 1173
Common questions
Is 1173 a prime number?
No, 1173 is not prime.
What are the factors of 1173?
The factors of 1173 are 1, 3, 17, 23, 51, 69, 391, 1173.
What is 1173 in Roman numerals?
1173 in Roman numerals is MCLXXIII.
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: 15 July 2026