1345
1345 is a year in the 14th century. The Bardi and Peruzzi banks of Florence failed after English default, an early sovereign debt crisis (Italy).
- Odd
- Composite
Where 1345 fits
Why 1345 is special
1345 has a profile because of what happened in it rather than because of any property of the number: the Bardi and Peruzzi banks of Florence failed after English default, an early sovereign debt crisis (Italy).
1345 is part of
Factors & digit properties
- Divisors (4)
- 1, 5, 269, 1345
- Prime factorisation
- 5 × 269
- Digit sum
- 13
- Digital root
- 4
Representations
- Decimal
- 1345
- Scientific notation
- 1.345 × 10^3
Roman numerals
M C C C X L V
MCCCXLV uses the subtractive pair XL: ten before fifty — fifty minus ten.
Binary
1 0 1 0 1 0 0 0 0 0 1
1 × 1,024 + 0 × 512 + 1 × 256 + 0 × 128 + 1 × 64 + 0 × 32 + 0 × 16 + 0 × 8 + 0 × 4 + 0 × 2 + 1 × 1 = 1,345
Octal
2 5 0 1
2 × 512 + 5 × 64 + 0 × 8 + 1 × 1 = 1,345
Hexadecimal
5 4 1
5 × 256 + 4 × 16 + 1 × 1 = 1,345
Read as powers of two: 1,024 + 256 + 64 + 1 = 1,345.
In historical numeral systems
Egyptian
1 lotus, 3 coils of rope, 4 hobbles, 5 strokes
1 × 1,000 + 3 × 100 + 4 × 10 + 5 × 1 = 1,345. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges + 2 vertical wedges (sixties place), 2 corner wedges + 5 vertical wedges (units place)
22 × 60 + 25 = 1345. 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
- Semiprime
Related numbers & connections
1345 is a year in the 14th century, in the 1340s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
History
In 1345, the Bardi and Peruzzi banks of Florence failed after English default, an early sovereign debt crisis (Italy).
DocumentedHistoryGeography: ItalyPeriod: 1345
Common questions
Is 1345 a prime number?
No, 1345 is not prime.
What are the factors of 1345?
The factors of 1345 are 1, 5, 269, 1345.
What is 1345 in Roman numerals?
1345 in Roman numerals is MCCCXLV. XL is subtractive: ten before fifty — fifty minus ten. Written additively it would be MCCCXXXXV, 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: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026