144
144 is twelve dozen — a 'gross' — and the only Fibonacci number greater than 1 that is also a perfect square (12²).
Where 144 fits
Why 144 is special
144 sits at a rare mathematical intersection: it's both a perfect square (12²) and a Fibonacci number, and mathematicians have proven it's the only Fibonacci number above 1 with that property. Outside mathematics, 'a gross' — 144, or twelve dozen — is a traditional wholesale counting unit still used for goods like pencils and eggs.
144 is part of
Factors & digit properties
- Divisors (15)
- 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144
- Prime factorisation
- 2^4 × 3^2
- Digit sum
- 9
- Digital root
- 9
Representations
- Decimal
- 144
- Binary
- 10010000
- Octal
- 220
- Hexadecimal
- 90
- Roman numeral
- CXLIV
- Scientific notation
- 1.440 × 10^2
Other mathematical patterns
- Abundant number
- Powerful number
- Harshad (Niven) number
Related numbers & connections
144 is the square of 12 (12² = 144).
View 12 →Mathematically related
- is the square of12
why?
Strength 0.50, confidence "high".
Everyday life
A 'gross' — twelve dozen, or 144 — is a traditional counting unit historically used in wholesale and retail trade for goods sold in bulk, such as pencils, eggs, or buttons, and remains part of the imperial system of units.
DocumentedEveryday life
Mathematics
144 is the only Fibonacci number greater than 1 that is also a perfect square (12² = 144) — a fact proven mathematically, not merely observed in the sequence's early terms.
DocumentedMathematics
Common questions
Is 144 a prime number?
No, 144 is not prime.
What are the factors of 144?
The factors of 144 are 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144.
What is 144 in Roman numerals?
144 in Roman numerals is CXLIV.
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: 30 July 2026