About the Number 861 (eight hundred sixty-one)

MathBabbler was doing a computing bit about the history of Unix and the Internet and he came across RFC 861.

   MathBabbler Number Analyst (MBNA) output:
   =========================================
   861 is a natural, whole, integer
   861 is odd
   861 proper divisors are: 1,3,7,21,41,123,287,
   861 is deficient (sum of divisors is 483)
   861 is unhappy
   861 is not a Harshad number
   861 is not prime
   861 has the prime factors: 3*7*41 (sum=51)
   861 is sphenic (had 3 unique prime factors)
   861 is a Smith number
   861 sum of prime factors is: 51
   861 in octal is 01535
   861 in hexadecimal is 0x35d
   861 in binary is 1101011101 (is odious)
   861 nearest square numbers: -20...39 (841...900 [30])
   sqrt(861) = 29.3428
   ln(861) = 6.75809
   log(861) = 2.935
   861 reciprocal is .00116144018583042973286875725900
   861 is an apocalyptic power
   861! is 9.47977e+2154
   861 is 274.065 Pi years
   861 is 43 score and 1 year
   861 written as a Roman numeral is DCCCLXI

log12(861) = 2.71966, which rounded to the nearest hundredth (2.72) approximates e (2.7182818284590) rounded to the nearest hundredth (2.72).


Creator: Gerald Thurman [gthurman@gmail.com]
Created: 07 September 2009

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