25404534 has 24 divisors (see below), whose sum is σ = 56216160. Its totient is φ = 8287728.

The previous prime is 25404527. The next prime is 25404563. The reversal of 25404534 is 43540452.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25404498 and 25404507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14169 + ... + 15860.

It is an arithmetic number, because the mean of its divisors is an integer number (2342340).

Almost surely, 2^25404534 is an apocalyptic number.

25404534 is an abundant number, since it is smaller than the sum of its proper divisors (30811626).

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

25404534 is a wasteful number, since it uses less digits than its factorization.

25404534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30084 (or 30081 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 25404534 is about 5040.2910630240. The cubic root of 25404534 is about 293.9704954426.

Adding to 25404534 its reverse (43540452), we get a palindrome (68944986).

The spelling of 25404534 in words is "twenty-five million, four hundred four thousand, five hundred thirty-four".