41
41 is a prime number, the atomic number of niobium, and forms a twin-prime pair with 43.
- Odd
- Prime
Where 41 fits
Why 41 is special
41 and 43 are two of the closer twin-prime pairs in the 0-100 range, sitting either side of the highly composite 42.
41 is part of
Factors & digit properties
- Divisors (2)
- 1, 41
- Prime factorisation
- 41
- Digit sum
- 5
- Digital root
- 5
Representations
- Decimal
- 41
- Binary
- 101001
- Octal
- 51
- Hexadecimal
- 29
- Roman numeral
- XLI
- Scientific notation
- 4.100 × 10^1
Other mathematical patterns
- Deficient number
- Sophie Germain prime
- Twin prime
Related numbers & connections
41 is a factor of 82 (41 × 2 = 82).
View 82 →41 and 43 are twin primes — two primes exactly two apart.
View 43 →Science
41 is the atomic number of niobium.
DocumentedScience
Mathematics
41 is prime, and forms a twin-prime pair with 43 — two primes exactly two apart.
DocumentedMathematics
Common questions
Is 41 a prime number?
Yes, 41 is prime — it has exactly two positive divisors: 1 and itself.
What are the factors of 41?
The factors of 41 are 1, 41.
What is 41 in Roman numerals?
41 in Roman numerals is XLI.
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