12505528 has 16 divisors (see below), whose sum is σ = 26797680. Its totient is φ = 5359488.

The previous prime is 12505501. The next prime is 12505543. The reversal of 12505528 is 82550521.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 12505496 and 12505505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111601 + ... + 111712.

It is an arithmetic number, because the mean of its divisors is an integer number (1674855).

Almost surely, 2^12505528 is an apocalyptic number.

It is an amenable number.

12505528 is an abundant number, since it is smaller than the sum of its proper divisors (14292152).

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

12505528 is a wasteful number, since it uses less digits than its factorization.

12505528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223326 (or 223322 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 12505528 is about 3536.3155967758. The cubic root of 12505528 is about 232.1136482427.

The spelling of 12505528 in words is "twelve million, five hundred five thousand, five hundred twenty-eight".