2005
Everything about the number 2005 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 2005
| Nominal | 2005 |
| Cardinal | two thousand five |
| Ordinal | 2,005th |
| This number as US currency | two thousand five dollars |
Properties (and some facts) of 2005
| Is 2005 an odd number? | 2005 is an odd number |
| Is 2005 an even number? | 2005 is not an even number |
| Is 2005 a palindrome? | 2005 is not a palindrome |
| Is 2005 a triangle number? | 2005 is not a triangle number |
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2005 in other bases
| Base 2 (Binary) | 11111010101 |
| Base 3 (Ternary) | 2202021 |
| Base 4 (Quaternary) | 133111 |
| Base 5 (Quinary) | 31010 |
| Base 6 (Senary) | 13141 |
| Base 8 (Octal) | 3725 |
| Base 12 (Duodecimal) | 11B1 |
| Base 16 (Hexadecimal) | 7D5 |
| Base 20 (Vigesimal) | 505 |
Primes and factors tests for 2005
| Is 2005 a prime number? | 2005 is not a prime number |
| Is 2005 a perfect number? | 2005 is not a perfect number |
| Is 2005 a Mersenne prime? | 2005 is not a Mersenne prime |
| Is 2005 a Fermat prime? | 2005 is not a Fermat prime |
| Is 2005 a Fibonacci prime? | 2005 is not a Fibonacci prime |
| Is 2005 a partition prime? | 2005 is not a partition prime |
| Is 2005 a Pell prime? | 2005 is not a Pell prime |
| Prime Factors | Prime factors of 2005 |
2005 in other numeral systems
| 2005 in Roman numerals | MMV |
| 2005 in Chinese numerals | 貳仟伍 |
| 2005 in Babylonian numerals |   |
| 2005 in Egyptian numerals | 𓆽𓏾 |
Roots and squares for 2005
| Is 2005 a square number? | 2005 is not a square number |
| Is 2005 a cube number? | 2005 is not a cube number |
| Square root of 2005 | 44.777226354476 |
| Cube root of 2005 | 12.609701103711 |
Recreational math for 2005
| Number 2005 reversed | 5002 |
| Sum of the digits | 7 |
| Number of digits | 4 |
Arithmetic tables for 2005
Other pages about 2005
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