2005
2005 is the year YouTube launched.
- Odd
- Composite
Where 2005 fits
Why 2005 is special
It was founded as a video dating site and pivoted when people uploaded everything else. Being bought by Google the following year for $1.65 billion made it the standard reference point for internet acquisition value.
Factors & digit properties
- Divisors (4)
- 1, 5, 401, 2005
- Prime factorisation
- 5 × 401
- Digit sum
- 7
- Digital root
- 7
Representations
- Decimal
- 2005
- Binary
- 11111010101
- Octal
- 3725
- Hexadecimal
- 7d5
- Roman numeral
- MMV
- Scientific notation
- 2.005 × 10^3
Other mathematical patterns
- Deficient number
- Semiprime
Related numbers & connections
YouTube launched in 2005 and the iPhone followed in 2007, which is what turned video from something watched at a desk into something watched anywhere.
View 2007 →Kodak built a digital camera in 1975 and shelved it; YouTube launched in 2005 and was bought within a year. Two opposite responses to a technology that threatened an existing business.
View 1975 →Media & popular culture
YouTube launched in 2005 as a video dating service and changed course when users uploaded everything except dating profiles. Google's $1.65 billion purchase the following year became the standard reference point for internet acquisition value.
DocumentedMedia & popular culturePeriod: 2005
Common questions
Is 2005 a prime number?
No, 2005 is not prime.
What are the factors of 2005?
The factors of 2005 are 1, 5, 401, 2005.
What is 2005 in Roman numerals?
2005 in Roman numerals is MMV.
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