1442
1442 is a year in the 15th century. Alfonso V of Aragon took Naples, joining it to the Crown of Aragon (Italy).
- Even
- Composite
Where 1442 fits
Why 1442 is special
1442 has a profile because of what happened in it rather than because of any property of the number: Alfonso V of Aragon took Naples, joining it to the Crown of Aragon (Italy).
1442 is part of
Factors & digit properties
- Divisors (8)
- 1, 2, 7, 14, 103, 206, 721, 1442
- Prime factorisation
- 2 × 7 × 103
- Digit sum
- 11
- Digital root
- 2
Representations
- Decimal
- 1442
- Scientific notation
- 1.442 × 10^3
Roman numerals
M C D X L I I
MCDXLII uses the subtractive pair XL: ten before fifty — fifty minus ten.
Binary
1 0 1 1 0 1 0 0 0 1 0
1 × 1,024 + 0 × 512 + 1 × 256 + 1 × 128 + 0 × 64 + 1 × 32 + 0 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 0 × 1 = 1,442
Octal
2 6 4 2
2 × 512 + 6 × 64 + 4 × 8 + 2 × 1 = 1,442
Hexadecimal
5 a 2
5 × 256 + a × 16 + 2 × 1 = 1,442
Read as powers of two: 1,024 + 256 + 128 + 32 + 2 = 1,442.
In historical numeral systems
Egyptian
1 lotus, 4 coils of rope, 4 hobbles, 2 strokes
1 × 1,000 + 4 × 100 + 4 × 10 + 2 × 1 = 1,442. 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), 2 vertical wedges (units place)
24 × 60 + 2 = 1442. 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
1442 is a year in the 15th century, in the 1440s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
History
In 1442, Alfonso V of Aragon took Naples, joining it to the Crown of Aragon (Italy).
DocumentedHistoryGeography: ItalyPeriod: 1442
Common questions
Is 1442 a prime number?
No, 1442 is not prime.
What are the factors of 1442?
The factors of 1442 are 1, 2, 7, 14, 103, 206, 721, 1442.
What is 1442 in Roman numerals?
1442 in Roman numerals is MCDXLII. XL is subtractive: ten before fifty — fifty minus ten. Written additively it would be MCCCCXXXXII, 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