Numberwise

4565

NGC 4565 is the Needle Galaxy.

1 confirmed record · 1 sourceChecked, general knowledgeHow we qualify claimsReport a correction

Where 4565 fits

Where 4565 fits: Related numbersRelated numbers: 5194, 5907, 5981, 891, 4594.Related numbers5194590759818914565
4565 connects to 1 world: related numbers.

Why 4565 is special

It is seen so precisely edge-on that its central bulge and dust lane can both be measured directly, which is rare and observationally valuable.

Factors & digit properties

Divisors (8)
1, 5, 11, 55, 83, 415, 913, 4565
Prime factorisation
5 × 11 × 83
Digit sum
20
Digital root
2

Representations

Decimal
4565
Scientific notation
4.565 × 10^3

Roman numerals

Roman numerals as modelled here goes up to 3,999.

Binary

1 0 0 0 1 1 1 0 1 0 1 0 1

1 × 4,096 + 0 × 2,048 + 0 × 1,024 + 0 × 512 + 1 × 256 + 1 × 128 + 1 × 64 + 0 × 32 + 1 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 1 × 1 = 4,565

Octal

1 0 7 2 5

1 × 4,096 + 0 × 512 + 7 × 64 + 2 × 8 + 5 × 1 = 4,565

Hexadecimal

1 1 d 5

1 × 4,096 + 1 × 256 + d × 16 + 5 × 1 = 4,565

Read as powers of two: 4,096 + 256 + 128 + 64 + 16 + 4 + 1 = 4,565.

In historical numeral systems

Egyptian

4 lotuses, 5 coils of rope, 6 hobbles, 5 strokes

4 × 1,000 + 5 × 100 + 6 × 10 + 5 × 1 = 4,565. 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

Connection
One spiral is seen face-on and the other edge-on, and between them they show a disc galaxy from both directions.

One spiral is seen face-on and the other edge-on, and between them they show a disc galaxy from both directions.

View 5194 →

Other connections

  • is associated with5194
    why?

    Strength 0.50, confidence "high".

  • is associated with5907
    why?

    Strength 0.50, confidence "high".

  • is associated with5981
    why?

    Strength 0.50, confidence "high".

  • is associated with891
    why?

    Strength 0.50, confidence "high".

  • is associated with4594
    why?

    Strength 0.50, confidence "high".

How is 4565 connected to another number? →

Science

  • NGC 4565 is a spiral galaxy viewed almost exactly edge-on, allowing direct study of disc thickness, dust distribution and bulge structure.

    DocumentedSciencePeriod: 1785–

Common questions

Is 4565 a prime number?

No, 4565 is not prime.

What are the factors of 4565?

The factors of 4565 are 1, 5, 11, 55, 83, 415, 913, 4565.

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