25797 has 4 divisors (see below), whose sum is σ = 34400. Its totient is φ = 17196.

The previous prime is 25793. The next prime is 25799. The reversal of 25797 is 79752.

25797 = 29² + 30² + ... + 46².

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25797 - 2² = 25793 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 15.

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 (25793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4297 + ... + 4302.

It is an arithmetic number, because the mean of its divisors is an integer number (8600).

2²⁵⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

25797 is a deficient number, since it is larger than the sum of its proper divisors (8603).

25797 is an equidigital number, since it uses as much as digits as its factorization.

25797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8602.

The product of its digits is 4410, while the sum is 30.

The square root of 25797 is about 160.6144451785. The cubic root of 25797 is about 29.5476582900.

The spelling of 25797 in words is "twenty-five thousand, seven hundred ninety-seven".