8561925 has 18 divisors (see below), whose sum is σ = 15335762. Its totient is φ = 4566240.

The previous prime is 8561909. The next prime is 8561939. The reversal of 8561925 is 5291658.

It is a happy number.

8561925 is a `hidden beast` number, since 8 + 561 + 92 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 370881 + 8191044 = 609^2 + 2862^2 .

It is not a de Polignac number, because 8561925 - 2⁴ = 8561909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8561925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18802 + ... + 19251.

Almost surely, 2^8561925 is an apocalyptic number.

It is an amenable number.

8561925 is a deficient number, since it is larger than the sum of its proper divisors (6773837).

8561925 is a wasteful number, since it uses less digits than its factorization.

8561925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38069 (or 38061 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 8561925 is about 2926.0767248997. The cubic root of 8561925 is about 204.5771573756.

It can be divided in two parts, 85 and 61925, that multiplied together give a palindrome (5263625).

The spelling of 8561925 in words is "eight million, five hundred sixty-one thousand, nine hundred twenty-five".