25597056 has 64 divisors (see below), whose sum is σ = 68544000. Its totient is φ = 8463360.

The previous prime is 25597049. The next prime is 25597057. The reversal of 25597056 is 65079552.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (25597057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73170 + ... + 73518.

It is an arithmetic number, because the mean of its divisors is an integer number (1071000).

Almost surely, 2^25597056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25597056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34272000).

25597056 is an abundant number, since it is smaller than the sum of its proper divisors (42946944).

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

25597056 is a wasteful number, since it uses less digits than its factorization.

25597056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 39.

The square root of 25597056 is about 5059.3533183600. The cubic root of 25597056 is about 294.7112217615.

The spelling of 25597056 in words is "twenty-five million, five hundred ninety-seven thousand, fifty-six".