25528634 has 4 divisors (see below), whose sum is σ = 38292954. Its totient is φ = 12764316.

The previous prime is 25528619. The next prime is 25528649. The reversal of 25528634 is 43682552.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (25528619) and next prime (25528649).

It can be written as a sum of positive squares in only one way, i.e., 14326225 + 11202409 = 3785^2 + 3347^2 .

It is a super-2 number, since 2×25528634² = 1303422307811912, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25528594 and 25528603.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6382157 + ... + 6382160.

Almost surely, 2^25528634 is an apocalyptic number.

25528634 is a deficient number, since it is larger than the sum of its proper divisors (12764320).

25528634 is a wasteful number, since it uses less digits than its factorization.

25528634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12764319.

The product of its digits is 57600, while the sum is 35.

The square root of 25528634 is about 5052.5868621925. The cubic root of 25528634 is about 294.4483956381.

It can be divided in two parts, 25528 and 634, that added together give a palindrome (26162).

The spelling of 25528634 in words is "twenty-five million, five hundred twenty-eight thousand, six hundred thirty-four".