### About the Number 45 (forty-five)

MathBabbler created a nBAB for the number 55 because 55 is in the Fibonacci sequence. While working on the nBAB for 55 he discovered it was a Kaprekar number. Just a few days earlier he documented Kaprekar numbers for the first time when he created a nBAB for the number 99. `45` is also a Kaprekar number.

```   MathBabbler Number Analyst (MBNA) output:
=========================================
45 is a natural, whole, integer
45 is odd
45 proper divisors are: 1,3,5,9,15,
45 is deficient (sum of divisors is 33)
45 is unhappy
45 is a Harshad number
45 is not prime
45 is undulating
45 has the prime factors: 3*3*5
45 in octal is 055
45 in hexadecimal is 0x2d
45 in binary is 101101 (is evil)
45 nearest square numbers: -9...4 (36...49 )
sqrt(45) = 6.7082
ln(45) = 3.80666
log(45) = 1.65321
45 reciprocal is .02222222222222222222222222222222
45! is 1.19622e+56
45 is 14.3239 Pi years
45 is 2 score and 5 years
45 written as a Roman numeral is XLV
```

`45` is a Kaprekar number.

```   45^2 = 2025
2025 split into two parts:  20|25
sum of the two parts:  20 + 25 = 45
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 25 March 2009 