25585897 has 4 divisors (see below), whose sum is σ = 25820740. Its totient is φ = 25351056.

The previous prime is 25585891. The next prime is 25585949. The reversal of 25585897 is 79858552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22240656 + 3345241 = 4716^2 + 1829^2 .

It is a cyclic number.

It is not a de Polignac number, because 25585897 - 2¹¹ = 25583849 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 25585897.

It is not an unprimeable number, because it can be changed into a prime (25585891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117258 + ... + 117475.

It is an arithmetic number, because the mean of its divisors is an integer number (6455185).

Almost surely, 2^25585897 is an apocalyptic number.

It is an amenable number.

25585897 is a deficient number, since it is larger than the sum of its proper divisors (234843).

25585897 is a wasteful number, since it uses less digits than its factorization.

25585897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234842.

The product of its digits is 1008000, while the sum is 49.

The square root of 25585897 is about 5058.2503892156. The cubic root of 25585897 is about 294.6683892246.

The spelling of 25585897 in words is "twenty-five million, five hundred eighty-five thousand, eight hundred ninety-seven".