154
The Tupolev Tu-154 carried much of the Soviet Union's air traffic.
- Even
- Composite
Where 154 fits
Why 154 is special
Its three engines and high-pressure tyres let it work from unpaved and poorly maintained strips that Western jets of the period could not use.
Factors & digit properties
- Divisors (8)
- 1, 2, 7, 11, 14, 22, 77, 154
- Prime factorisation
- 2 × 7 × 11
- Digit sum
- 10
- Digital root
- 1
Representations
- Decimal
- 154
- Scientific notation
- 1.540 × 10^2
Roman numerals
C L I V
CLIV uses the subtractive pair IV: one before five — five minus one.
Binary
1 0 0 1 1 0 1 0
1 × 128 + 0 × 64 + 0 × 32 + 1 × 16 + 1 × 8 + 0 × 4 + 1 × 2 + 0 × 1 = 154
Octal
2 3 2
2 × 64 + 3 × 8 + 2 × 1 = 154
Hexadecimal
9 a
9 × 16 + a × 1 = 154
Read as powers of two: 128 + 16 + 8 + 2 = 154.
In historical numeral systems
Egyptian
1 coil of rope, 5 hobbles, 4 strokes
1 × 100 + 5 × 10 + 4 × 1 = 154. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
2 vertical wedges (sixties place), 3 corner wedges + 4 vertical wedges (units place)
2 × 60 + 34 = 154. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
rho, then nu, then delta, marked as a numeral
rho-nu-delta + keraia
rho + nu + delta written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
qof, then nun, then dalet
qof-nun-dalet
qof (100) + nun (50) + dalet (4) = 154, written in descending order.
Maya
1 bar + 2 dots (upper, twenties place) over 2 bars + 4 dots (lower, units place)
7 × 20 + 14 = 154. Places stack vertically with the smallest at the bottom, so the upper group is worth twenty times the lower.
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
Both were Soviet airliners built in large numbers for infrastructure that Western jets could not use.
View 134 →The two Tupolev jets covered short and medium haul across the same network for four decades.
View 134 →Technology & computing
The Tupolev Tu-154 entered service in 1972 and was built in over nine hundred examples. Its landing gear and engine configuration permitted operation from gravel and rough runways.
DocumentedTechnology & computingGeography: Soviet Union and successor statesPeriod: 1972–2020
Common questions
Is 154 a prime number?
No, 154 is not prime.
What are the factors of 154?
The factors of 154 are 1, 2, 7, 11, 14, 22, 77, 154.
What is 154 in Roman numerals?
154 in Roman numerals is CLIV. IV is subtractive: one before five — five minus one. Written additively it would be CLIIII, 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: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026