5145
5145 Pholus is one of the reddest objects known.
- Odd
- Composite
Where 5145 fits
Why 5145 is special
Its surface colour is attributed to organic compounds altered by radiation over very long periods, which is a clock of sorts.
Factors & digit properties
- Divisors (16)
- 1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 343, 735, 1029, 1715, 5145
- Prime factorisation
- 3 × 5 × 7^3
- Digit sum
- 15
- Digital root
- 6
Representations
- Decimal
- 5145
- Scientific notation
- 5.145 × 10^3
Roman numerals
Roman numerals as modelled here goes up to 3,999.
Binary
1 0 1 0 0 0 0 0 1 1 0 0 1
1 × 4,096 + 0 × 2,048 + 1 × 1,024 + 0 × 512 + 0 × 256 + 0 × 128 + 0 × 64 + 0 × 32 + 1 × 16 + 1 × 8 + 0 × 4 + 0 × 2 + 1 × 1 = 5,145
Octal
1 2 0 3 1
1 × 4,096 + 2 × 512 + 0 × 64 + 3 × 8 + 1 × 1 = 5,145
Hexadecimal
1 4 1 9
1 × 4,096 + 4 × 256 + 1 × 16 + 9 × 1 = 5,145
Read as powers of two: 4,096 + 1,024 + 16 + 8 + 1 = 5,145.
In historical numeral systems
Egyptian
5 lotuses, 1 coil of rope, 4 hobbles, 5 strokes
5 × 1,000 + 1 × 100 + 4 × 10 + 5 × 1 = 5,145. 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
- Harshad (Niven) number
Related numbers & connections
Surface colour and activity are the two properties that distinguish centaurs from one another.
View 2060 →Other connections
- is associated with2060
why?
Strength 0.50, confidence "high".
Science
5145 Pholus is a centaur with an extremely red spectrum, attributed to irradiated organic material accumulated on an unresurfaced surface.
DocumentedSciencePeriod: 1992–
Common questions
Is 5145 a prime number?
No, 5145 is not prime.
What are the factors of 5145?
The factors of 5145 are 1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 343, 735, 1029, 1715, 5145.
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