### About the Number 1975 (one thousand nine hundred seventy-five)

On 21 December 2008, MathBabbler posted BAB# 1975. During early June of 1975, MathBabbler graduated from South Milwaukee Senior High School and during the fall of 1975 (at the age of 18) he became a freshman at UW-Whitewater.

```   MathBabbler Number Analyst (MBNA) output:
=========================================
1975 is a natural, whole, integer
1975 is odd
1975 proper divisors are: 1,5,25,79,395,
1975 is deficient (sum of divisors is 505)
1975 is unhappy
1975 is not a Harshad number
1975 is not prime
1975 has the prime factors: 5*5*79
1975 in octal is 03667
1975 in binary is 11110110111 (is odious)
1975 nearest square numbers: -39...50 (1936...2025 [45])
sqrt(1975) = 44.441
ln(1975) = 7.58832
log(1975) = 3.29557
1975 reciprocal is .00050632911392405063291139240506
1975! is inf
1975 is 628.662 Pi years
1975 is 98 score and 15 years
```

`1975` written as a Roman numeral is `MCMLXXV`.

If the digits 7 and 5 in `1975` are swapped, then the resulting number (1957) is MathBabbler's birthyear.

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 21 December 2008