8257725 has 72 divisors (see below), whose sum is σ = 17409600. Its totient is φ = 3739680.

The previous prime is 8257709. The next prime is 8257757. The reversal of 8257725 is 5277528.

8257725 is a `hidden beast` number, since 82 + 577 + 2 + 5 = 666.

8257725 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 8257725 - 2⁴ = 8257709 is a prime.

It is a Curzon number.

8257725 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8257725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 77122 + ... + 77228.

It is an arithmetic number, because the mean of its divisors is an integer number (241800).

Almost surely, 2^8257725 is an apocalyptic number.

It is an amenable number.

8257725 is an abundant number, since it is smaller than the sum of its proper divisors (9151875).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8257725 is a wasteful number, since it uses less digits than its factorization.

8257725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 122 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 8257725 is about 2873.6257585148. The cubic root of 8257725 is about 202.1250491932.

The spelling of 8257725 in words is "eight million, two hundred fifty-seven thousand, seven hundred twenty-five".