Numberwise

1529

1529 is the year of the first Ottoman siege of Vienna.

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Where 1529 fits

Where 1529 fits: Mathematics, History, Related numbersMathematics: Semiprime. History: Historical years. Related numbers: 1533, 1683.MathematicsSemiprimeHistoryHistorical yearsRelated numbers153316831529
1529 connects to 3 worlds: mathematics, history, related numbers.

Why 1529 is special

It failed partly because heavy rain had forced the abandonment of the siege artillery en route. Weather did as much as defence.

1529 is part of

Numbers around us

Factors & digit properties

Divisors (4)
1, 11, 139, 1529
Prime factorisation
11 × 139
Digit sum
17
Digital root
8

Representations

Decimal
1529
Scientific notation
1.529 × 10^3

Roman numerals

M D X X I X

MDXXIX uses the subtractive pair IX: one before ten — ten minus one.

Binary

1 0 1 1 1 1 1 1 0 0 1

1 × 1,024 + 0 × 512 + 1 × 256 + 1 × 128 + 1 × 64 + 1 × 32 + 1 × 16 + 1 × 8 + 0 × 4 + 0 × 2 + 1 × 1 = 1,529

Octal

2 7 7 1

2 × 512 + 7 × 64 + 7 × 8 + 1 × 1 = 1,529

Hexadecimal

5 f 9

5 × 256 + f × 16 + 9 × 1 = 1,529

Read as powers of two: 1,024 + 256 + 128 + 64 + 32 + 16 + 8 + 1 = 1,529.

In historical numeral systems

Egyptian

1 lotus, 5 coils of rope, 2 hobbles, 9 strokes

1 × 1,000 + 5 × 100 + 2 × 10 + 9 × 1 = 1,529. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.

Babylonian

2 corner wedges + 5 vertical wedges (sixties place), 2 corner wedges + 9 vertical wedges (units place)

25 × 60 + 29 = 1529. 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

Related numbers & connections

Documented appearance
1529 is a year in the 16th century, in the 1520s.

1529 is a year in the 16th century, in the 1520s.

Connection
Henry VIII's divorce case was heard in 1529 and he was excommunicated in 1533, by which point England had already legislated to stop appeals to Rome.

Henry VIII's divorce case was heard in 1529 and he was excommunicated in 1533, by which point England had already legislated to stop appeals to Rome.

View 1533 →

Numbers Around Us

  • appears inHistorical years
    why?

    Strength 0.50, confidence "high".

Other connections

  • is associated with1533
    why?

    Strength 0.50, confidence "high".

  • developed from1683
    why?

    Strength 0.50, confidence "high".

How is 1529 connected to another number? →

History

  • The 1529 siege of Vienna failed in substantial part because the Ottoman heavy guns could not be brought through autumn rains. The second attempt in 1683 also failed, and marks the limit of Ottoman expansion.

    DocumentedHistoryGeography: ViennaPeriod: 1529

  • In 1529, an Ottoman army under Suleiman the Magnificent besieged Vienna and withdrew, marking the limit of Ottoman expansion into central Europe (Central Europe).

    DocumentedHistoryGeography: Central EuropePeriod: 1529

Common questions

Is 1529 a prime number?

No, 1529 is not prime.

What are the factors of 1529?

The factors of 1529 are 1, 11, 139, 1529.

What is 1529 in Roman numerals?

1529 in Roman numerals is MDXXIX. IX is subtractive: one before ten — ten minus one. Written additively it would be MDXXVIIII, which Roman inscriptions used freely — the strict subtractive form is a later convention.

About this page's data

Mathematical facts:computed directly from the number's value — nothing to source or verify externally.

Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.

Last reviewed: 15 July 2026