Numberwise

1045

1045 is a medium-carbon steel.

2 confirmed records · 2 sourcesChecked and sourcedChecked, general knowledgeHow we qualify claimsReport a correction

Where 1045 fits

Where 1045 fits: History, Related numbersHistory: Historical years. Related numbers: 4140, 1018.HistoryHistorical yearsRelated numbers414010181045
1045 connects to 2 worlds: history, related numbers.

Why 1045 is special

It is the default general-purpose shaft material: strong enough for most work, cheap, and machinable without special tooling.

1045 is part of

Numbers around us

Factors & digit properties

Divisors (8)
1, 5, 11, 19, 55, 95, 209, 1045
Prime factorisation
5 × 11 × 19
Digit sum
10
Digital root
1

Representations

Decimal
1045
Scientific notation
1.045 × 10^3

Roman numerals

M X L V

MXLV uses the subtractive pair XL: ten before fifty — fifty minus ten.

Binary

1 0 0 0 0 0 1 0 1 0 1

1 × 1,024 + 0 × 512 + 0 × 256 + 0 × 128 + 0 × 64 + 0 × 32 + 1 × 16 + 0 × 8 + 1 × 4 + 0 × 2 + 1 × 1 = 1,045

Octal

2 0 2 5

2 × 512 + 0 × 64 + 2 × 8 + 5 × 1 = 1,045

Hexadecimal

4 1 5

4 × 256 + 1 × 16 + 5 × 1 = 1,045

Read as powers of two: 1,024 + 16 + 4 + 1 = 1,045.

In historical numeral systems

Egyptian

1 lotus, 4 hobbles, 5 strokes

1 × 1,000 + 4 × 10 + 5 × 1 = 1,045. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.

Babylonian

1 corner wedge + 7 vertical wedges (sixties place), 2 corner wedges + 5 vertical wedges (units place)

17 × 60 + 25 = 1045. 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

  • Deficient number

Related numbers & connections

Documented appearance
1045 is a year in the 11th century, in the 1040s.

1045 is a year in the 11th century, in the 1040s.

Connection
More carbon buys strength and costs weldability, which is the basic trade in plain carbon steels.

More carbon buys strength and costs weldability, which is the basic trade in plain carbon steels.

View 1018 →

Numbers Around Us

  • appears inHistorical years
    why?

    Strength 0.50, confidence "high".

  • appears alongside4140
    why?

    Strength 0.50, confidence "high".

Other connections

  • developed from1018
    why?

    Strength 0.50, confidence "high".

How is 1045 connected to another number? →

Technology & computing

  • In 1045, Bi Sheng's movable type is described by Shen Kuo as in use around this time, using baked clay characters set in an iron frame (China).

    DocumentedTechnology & computingGeography: ChinaPeriod: 1045

  • AISI 1045 contains roughly 0.45 percent carbon, offering a balance of strength and machinability without alloying additions.

    DocumentedTechnology & computingGeography: International — AISI, SAE and Aluminium Association designations

Common questions

Is 1045 a prime number?

No, 1045 is not prime.

What are the factors of 1045?

The factors of 1045 are 1, 5, 11, 19, 55, 95, 209, 1045.

What is 1045 in Roman numerals?

1045 in Roman numerals is MXLV. XL is subtractive: ten before fifty — fifty minus ten. Written additively it would be MXXXXV, 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