1025
1025 is a year in the 11th century. Rajendra Chola launched a naval expedition across the Bay of Bengal against Srivijaya (Southeast Asia).
- Odd
- Composite
Where 1025 fits
Why 1025 is special
1025 has a profile because of what happened in it rather than because of any property of the number: Rajendra Chola launched a naval expedition across the Bay of Bengal against Srivijaya (Southeast Asia).
1025 is part of
Factors & digit properties
- Divisors (6)
- 1, 5, 25, 41, 205, 1025
- Prime factorisation
- 5^2 × 41
- Digit sum
- 8
- Digital root
- 8
Representations
- Decimal
- 1025
- Scientific notation
- 1.025 × 10^3
Roman numerals
M X X V
Binary
1 0 0 0 0 0 0 0 0 0 1
1 × 1,024 + 0 × 512 + 0 × 256 + 0 × 128 + 0 × 64 + 0 × 32 + 0 × 16 + 0 × 8 + 0 × 4 + 0 × 2 + 1 × 1 = 1,025
Octal
2 0 0 1
2 × 512 + 0 × 64 + 0 × 8 + 1 × 1 = 1,025
Hexadecimal
4 0 1
4 × 256 + 0 × 16 + 1 × 1 = 1,025
Read as powers of two: 1,024 + 1 = 1,025.
In historical numeral systems
Egyptian
1 lotus, 2 hobbles, 5 strokes
1 × 1,000 + 2 × 10 + 5 × 1 = 1,025. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 7 vertical wedges (sixties place), 5 vertical wedges (units place)
17 × 60 + 5 = 1025. 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
1025 is a year in the 11th century, in the 1020s.
Numbers Around Us
- appears inHistorical years
why?
Strength 0.50, confidence "high".
History
In 1025, Rajendra Chola launched a naval expedition across the Bay of Bengal against Srivijaya (Southeast Asia).
DocumentedHistoryGeography: Southeast AsiaPeriod: 1025
Common questions
Is 1025 a prime number?
No, 1025 is not prime.
What are the factors of 1025?
The factors of 1025 are 1, 5, 25, 41, 205, 1025.
What is 1025 in Roman numerals?
1025 in Roman numerals is MXXV.
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