505was the smallest number without a nBAB on 15 June 2018.MathBabbler Number Analyst (MBNA) output: ========================================= 505 is natural, counting, whole, integer 505 is odd (not even) 505 is not extremely odd 505 proper divisors are: 1,5,101, 505 has 3 proper divisors 505 is deficient (sum of divisors is 107; ratio: 0.211881) 505 is unhappy 505 is a Squarefree Number 505 is composite (not prime) 505 has the prime factors: 5*101 (sum=106) 505 is semiprime (biprime or 2-almost prime) 505 is a 101-smooth number 505 is sum of two squares ...505 = 12^2 + 19^2 ...505 = 8^2 + 21^2 505 is undulating 505 is palindromic 505 has all palindromic proper divisors (1,5,101) 505 is in OEIS::A117746 (23; 23)alt 505 in octal is 0771 505 in hexadecimal is 0x1f9 505 in binary is 111111001 (is odious) 505 nearest square numbers: -21...24 (484...529 [23]) sqrt(505) = 22.4722 ln(505) = 6.22456 log(505) = 2.70329 505! is 3.92862e+1147 505 is 160.746 Pi years 505 is 25 score and 5 years 505 written as a Roman numeral is DV 505 is 253^2 - 252^2 and 253 + 252 = 505 505 is a multiple of 5 & it contains a 5 (A121025) ____ 505 reciprocal is 0.00198 remainders: 1,10,100,495,405,10

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 15 June 2018

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