MathBabbler posted a nBAB for the number 123 and he noticed he had nBABs for 121, 123, and 127; therefore, he decided to create this nBAB for the number

`. In addition, nBABs existed for the following numbers that end in the digit 5 (5, 15, 25, 35, 45, 55, 65, 75, 85, 95, 105, 115). Now the number`

125`can be added to this sequence.`

125MathBabbler Number Analyst (MBNA) output: ========================================= 125 is a natural, whole, integer 125 is odd 125 proper divisors are: 1,5,25, 125 is deficient (sum of divisors is 31) 125 is unhappy 125 is not a Harshad number 125 is not prime 125 has the prime factors: 5*5*5 125 in octal is 0175 125 in hexadecimal is 0x7d 125 in binary is 1111101 (is evil) 125 nearest square numbers: -4...19 (121...144 [12]) sqrt(125) = 11.1803 ln(125) = 4.82831 log(125) = 2.09691 125 is 5^3 125 reciprocal is .00800000000000000000000000000000 125! is 1.88268e+209 125 is 39.7887 Pi years 125 is 6 score and 5 years 125 written as a Roman numeral is CXXV

`is a cuban number.`

125

`equals 10^2 + 5^2 and it equals 11^2 + 4^2.`

125

`[Wikipedia]`

`is a Ruth-Aaron pair with 126. On 31 March 2009, the MBNA was not checking for Ruth-Aaron pairs.`

125

`[Wikipedia]`

`is a Friedman number because it is the "result of an expression using all its own digits in combination with any of the four basic arithmetic operators and sometimes exponentiation."`

125125= 5^(1 + 2) 25 is a Friedman number... digits are 2, 5: 5^2 = 25 121 is a Friedman number... digits are 1, 2, 1: 11^2 = 121 128 is a Friedman number... digits are 1, 2, 8: 2^(8 - 1) = 128OEIS.org::id:A036057

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

**Created:** 31 March 2009

This work is licensed under a Creative Commons Attribution 3.0 United States License.