25448581 has 4 divisors (see below), whose sum is σ = 26788000. Its totient is φ = 24109164.

The previous prime is 25448569. The next prime is 25448587. The reversal of 25448581 is 18584452.

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 a cyclic number.

It is not a de Polignac number, because 25448581 - 2¹⁵ = 25415813 is a prime.

It is a super-2 number, since 2×25448581² = 1295260549827122, which contains 22 as substring.

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 25448581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25448587) 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, 669681 + ... + 669718.

It is an arithmetic number, because the mean of its divisors is an integer number (6697000).

Almost surely, 2^25448581 is an apocalyptic number.

It is an amenable number.

25448581 is a deficient number, since it is larger than the sum of its proper divisors (1339419).

25448581 is a wasteful number, since it uses less digits than its factorization.

25448581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339418.

The product of its digits is 51200, while the sum is 37.

The square root of 25448581 is about 5044.6586604051. The cubic root of 25448581 is about 294.1402950819.

The spelling of 25448581 in words is "twenty-five million, four hundred forty-eight thousand, five hundred eighty-one".