1722
1722 is the year Easter Island was first visited by Europeans.
- Even
- Composite
Where 1722 fits
Why 1722 is special
It was reached on Easter Sunday, which is where the name comes from. The society that raised the statues had already collapsed, and why is still argued.
Factors & digit properties
- Divisors (16)
- 1, 2, 3, 6, 7, 14, 21, 41, 42, 82, 123, 246, 287, 574, 861, 1722
- Prime factorisation
- 2 × 3 × 7 × 41
- Digit sum
- 12
- Digital root
- 3
Representations
- Decimal
- 1722
- Binary
- 11010111010
- Octal
- 3272
- Hexadecimal
- 6ba
- Roman numeral
- MDCCXXII
- Scientific notation
- 1.722 × 10^3
Other mathematical patterns
- Abundant number
Related numbers & connections
The Batavia wreck of 1629 and the European sighting of Easter Island in 1722 are both events documented only because Dutch trading companies kept records of them.
View 1629 →Other connections
- is associated with1629
why?
Strength 0.50, confidence "high".
Geography
Roggeveen reached the island on Easter Sunday 1722. The moai were already standing and the society that made them was much reduced, with deforestation, introduced rats and later slave raids all argued as causes.
DocumentedGeographyGeography: Rapa NuiPeriod: 1722
Common questions
Is 1722 a prime number?
No, 1722 is not prime.
What are the factors of 1722?
The factors of 1722 are 1, 2, 3, 6, 7, 14, 21, 41, 42, 82, 123, 246, 287, 574, 861, 1722.
What is 1722 in Roman numerals?
1722 in Roman numerals is MDCCXXII.
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