25,143
25143 Itokawa was the target of the Hayabusa mission.
- Odd
- Composite
Where 25,143 fits
Why 25,143 is special
The spacecraft returned the first material ever collected from an asteroid, though a series of failures meant it brought back only about 1,500 grains.
Factors & digit properties
- Divisors (12)
- 1, 3, 17, 29, 51, 87, 289, 493, 867, 1479, 8381, 25143
- Prime factorisation
- 3 × 17^2 × 29
- Digit sum
- 15
- Digital root
- 6
Representations
- Decimal
- 25143
- Scientific notation
- 2.514 × 10^4
Roman numerals
Roman numerals as modelled here goes up to 3,999.
Binary
1 1 0 0 0 1 0 0 0 1 1 0 1 1 1
1 × 16,384 + 1 × 8,192 + 0 × 4,096 + 0 × 2,048 + 0 × 1,024 + 1 × 512 + 0 × 256 + 0 × 128 + 0 × 64 + 1 × 32 + 1 × 16 + 0 × 8 + 1 × 4 + 1 × 2 + 1 × 1 = 25,143
Octal
6 1 0 6 7
6 × 4,096 + 1 × 512 + 0 × 64 + 6 × 8 + 7 × 1 = 25,143
Hexadecimal
6 2 3 7
6 × 4,096 + 2 × 256 + 3 × 16 + 7 × 1 = 25,143
Read as powers of two: 16,384 + 8,192 + 512 + 32 + 16 + 4 + 2 + 1 = 25,143.
In historical numeral systems
Egyptian
2 fingers, 5 lotuses, 1 coil of rope, 4 hobbles, 3 strokes
2 × 10,000 + 5 × 1,000 + 1 × 100 + 4 × 10 + 3 × 1 = 25,143. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
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
Hayabusa2 corrected the sampling failures of the first mission and returned material from a crater it made deliberately.
View 162173 →Science
Hayabusa reached 25143 Itokawa in 2005 and returned a capsule in 2010. Sampling malfunctioned, but roughly 1,500 particles were recovered and confirmed as asteroidal.
DocumentedSciencePeriod: 1998–
Common questions
Is 25,143 a prime number?
No, 25,143 is not prime.
What are the factors of 25,143?
The factors of 25,143 are 1, 3, 17, 29, 51, 87, 289, 493, 867, 1479, 8381, 25143.
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