The number 261

Representation numerals

Greek numeral

σξαʹ

Arabic numeral

٢٦١

Roman numeral

CCLXI

Maya numeral

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Chinese numeral

二百六十一

Hebrew numeral

רסא
Numeral systems
Binary: 100000101
Septimal (base 7): 522
Octal: 405
Hexadecimal: 105
Base 24: AL
Factorization
261 = 3 × 3 × 29
261 has 6 divisors: 1, 3, 9, 29, 87, 261
Sum of all divisors other than 261: 129
Sums & differences
Sum of 2 squares: 261 = 152 + 62
Difference of 2 squares: 261 = 192 - 102 = 452 - 422 = 1312 - 1302
Characteristics
Related primes
The 261th prime number is: 1663
Previous prime number: 257 — Next prime number: 263
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