25597 has 8 divisors (see below), whose sum is σ = 30240. Its totient is φ = 21360.

The previous prime is 25589. The next prime is 25601. The reversal of 25597 is 79552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25597 - 2³ = 25589 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54 + ... + 232.

It is an arithmetic number, because the mean of its divisors is an integer number (3780).

2²⁵⁵⁹⁷ is an apocalyptic number.

It is an amenable number.

25597 is a deficient number, since it is larger than the sum of its proper divisors (4643).

25597 is a wasteful number, since it uses less digits than its factorization.

25597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203.

The product of its digits is 3150, while the sum is 28.

The square root of 25597 is about 159.9906247253. The cubic root of 25597 is about 29.4711006843.

The spelling of 25597 in words is "twenty-five thousand, five hundred ninety-seven".