242
+242 is the international calling code for Republic of the Congo.
- Even
- Composite
Where 242 fits
Why 242 is special
Two neighbouring countries are both called Congo, distinguished in practice by their capitals — Brazzaville here, Kinshasa across the river. Their calling codes, +242 and +243, are one of the few unambiguous ways to tell them apart.
242 is part of
Factors & digit properties
- Divisors (6)
- 1, 2, 11, 22, 121, 242
- Prime factorisation
- 2 × 11^2
- Digit sum
- 8
- Digital root
- 8
Representations
- Decimal
- 242
- Binary
- 11110010
- Octal
- 362
- Hexadecimal
- f2
- Roman numeral
- CCXLII
- Scientific notation
- 2.420 × 10^2
Other mathematical patterns
- Palindromic number
- Deficient number
Related numbers & connections
Gabon and the Republic of the Congo share a border and both sit in the Congo Basin, the second-largest rainforest on Earth.
View 241 →Geography
+242 reaches the Republic of the Congo. Its capital Brazzaville and Kinshasa in the Democratic Republic of the Congo face each other across the river — the closest pair of capital cities in the world, in two different countries.
DocumentedGeographyGeography: Republic of the Congo
Common questions
Is 242 a prime number?
No, 242 is not prime.
What are the factors of 242?
The factors of 242 are 1, 2, 11, 22, 121, 242.
What is 242 in Roman numerals?
242 in Roman numerals is CCXLII.
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: 3 August 2026