25573 has 4 divisors (see below), whose sum is σ = 25920. Its totient is φ = 25228.

The previous prime is 25561. The next prime is 25577. The reversal of 25573 is 37552.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25573 - 2⁵ = 25541 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 (25577) 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, 13 + ... + 226.

It is an arithmetic number, because the mean of its divisors is an integer number (6480).

2²⁵⁵⁷³ is an apocalyptic number.

It is an amenable number.

25573 is a deficient number, since it is larger than the sum of its proper divisors (347).

25573 is a wasteful number, since it uses less digits than its factorization.

25573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346.

The product of its digits is 1050, while the sum is 22.

The square root of 25573 is about 159.9156027409. The cubic root of 25573 is about 29.4618870057.

The spelling of 25573 in words is "twenty-five thousand, five hundred seventy-three".