1425
1425 is a year in the 15th century. The University of Louvain was founded (Low Countries).
- Odd
- Composite
Where 1425 fits
Why 1425 is special
1425 has a profile because of what happened in it rather than because of any property of the number: the University of Louvain was founded (Low Countries).
1425 is part of
Factors & digit properties
- Divisors (12)
- 1, 3, 5, 15, 19, 25, 57, 75, 95, 285, 475, 1425
- Prime factorisation
- 3 × 5^2 × 19
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 1425
- Scientific notation
- 1.425 × 10^3
Roman numerals
M C D X X V
MCDXXV uses the subtractive pair CD: a hundred before five hundred — five hundred minus a hundred.
Binary
1 0 1 1 0 0 1 0 0 0 1
1 × 1,024 + 0 × 512 + 1 × 256 + 1 × 128 + 0 × 64 + 0 × 32 + 1 × 16 + 0 × 8 + 0 × 4 + 0 × 2 + 1 × 1 = 1,425
Octal
2 6 2 1
2 × 512 + 6 × 64 + 2 × 8 + 1 × 1 = 1,425
Hexadecimal
5 9 1
5 × 256 + 9 × 16 + 1 × 1 = 1,425
Read as powers of two: 1,024 + 256 + 128 + 16 + 1 = 1,425.
In historical numeral systems
Egyptian
1 lotus, 4 coils of rope, 2 hobbles, 5 strokes
1 × 1,000 + 4 × 100 + 2 × 10 + 5 × 1 = 1,425. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 corner wedges + 3 vertical wedges (sixties place), 4 corner wedges + 5 vertical wedges (units place)
23 × 60 + 45 = 1425. 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
1425 is a year in the 15th century, in the 1420s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
History
In 1425, the University of Louvain was founded (Low Countries).
DocumentedHistoryGeography: Low CountriesPeriod: 1425
Common questions
Is 1425 a prime number?
No, 1425 is not prime.
What are the factors of 1425?
The factors of 1425 are 1, 3, 5, 15, 19, 25, 57, 75, 95, 285, 475, 1425.
What is 1425 in Roman numerals?
1425 in Roman numerals is MCDXXV. CD is subtractive: a hundred before five hundred — five hundred minus a hundred. Written additively it would be MCCCCXXV, 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