Numberwise

525

K. 525 is Eine kleine Nachtmusik.

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Where 525 fits

Where 525 fits: Mathematics, Media, Related numbersMathematics: Palindromic number. Media: Numbers assigned as identifiers. Related numbers: 331, 543, 448.MathematicsPalindromic numberMediaNumbers assigned as identif…Related numbers331543448525
525 connects to 3 worlds: mathematics, media, related numbers.

Why 525 is special

The catalogue records five movements and only four survive, so one of the most played pieces in the repertoire is incomplete.

525 is part of

Identifier numbersRepeating / palindromic numbersNumbers around us

Factors & digit properties

Divisors (12)
1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 175, 525
Prime factorisation
3 × 5^2 × 7
Digit sum
12
Digital root
3

Representations

Decimal
525
Binary
1000001101
Octal
1015
Hexadecimal
20d
Roman numeral
DXXV
Scientific notation
5.250 × 10^2

Other mathematical patterns

Related numbers & connections

Documented appearance
K. 525 is a Köchel catalogue number, the identifier by which Mozart's works are cited in every programme note.

K. 525 is a Köchel catalogue number, the identifier by which Mozart's works are cited in every programme note.

Connection
A 2014 manuscript find changed a very familiar piece, as the missing movement leaves another incomplete.

A 2014 manuscript find changed a very familiar piece, as the missing movement leaves another incomplete.

View 331 →

Numbers Around Us

  • appears inNumbers assigned as identifiers
    why?

    Strength 0.50, confidence "high".

Other connections

  • is associated with331
    why?

    Strength 0.50, confidence "high".

  • is associated with543
    why?

    Strength 0.50, confidence "high".

  • is associated with448
    why?

    Strength 0.50, confidence "high".

How is 525 connected to another number? →

Media & popular culture

  • K. 525 is listed in Mozart's own catalogue with five movements. The minuet and trio that stood second is lost, so the work is performed in four movements.

    DocumentedMedia & popular cultureGeography: AustriaPeriod: 1787

Common questions

Is 525 a prime number?

No, 525 is not prime.

What are the factors of 525?

The factors of 525 are 1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 175, 525.

What is 525 in Roman numerals?

525 in Roman numerals is DXXV.

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: 3 August 2026