13528257 has 4 divisors (see below), whose sum is σ = 18037680. Its totient is φ = 9018836.

The previous prime is 13528211. The next prime is 13528259. The reversal of 13528257 is 75282531.

13528257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13528257 - 2⁷ = 13528129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13528259) 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, 2254707 + ... + 2254712.

It is an arithmetic number, because the mean of its divisors is an integer number (4509420).

Almost surely, 2^13528257 is an apocalyptic number.

It is an amenable number.

13528257 is a deficient number, since it is larger than the sum of its proper divisors (4509423).

13528257 is an equidigital number, since it uses as much as digits as its factorization.

13528257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4509422.

The product of its digits is 16800, while the sum is 33.

The square root of 13528257 is about 3678.0778947706. The cubic root of 13528257 is about 238.2761723591.

The spelling of 13528257 in words is "thirteen million, five hundred twenty-eight thousand, two hundred fifty-seven".