### About the Number 4,025 (four thousand twenty-five)

The following video has four train engines. The first engine in number 4025 followed by 1704, 7842, and 4828.

```MathBabbler Number Analyst (MBNA) output:
=========================================
4025 is a natural, whole, integer
4025 is odd
4025 proper divisors are: 1,5,7,23,25,35,115,161,175,575,805,
4025 has 11 proper divisors
4025 is deficient (sum of divisors is 1927; ratio: 0.478758)
4025 is unhappy
4025 is not a Squarefree Number: 25,
4025 is composite (not prime)
4025 has the prime factors: 5*5*7*23 (sum=40)
4025 is a 23-smooth number
4025 is Arithmetic (A003601)
4025 is not in A038853
4025 in octal is 07671
4025 in hexadecimal is 0xfb9
4025 in binary is 111110111001 (is odious)
4025 nearest square numbers: -56...71 (3969...4096 )
sqrt(4025) = 63.4429
ln(4025) = 8.30028
log(4025) = 3.60477
4025 reciprocal is .00024844720496894409937888198757
4025 is an apocalyptic power
4025! is inf
4025 is 1281.2 Pi years
4025 is 201 score and 5 years
4025 is 2013^2 - 2012^2 and 2013 + 2012 = 4025
4025 is a multiple of 5 & it contains a 5 (A121025)
4025 is a multiple of 25 & it contains a 25
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 20 January 2016 