13257886 has 4 divisors (see below), whose sum is σ = 19886832. Its totient is φ = 6628942.

The previous prime is 13257869. The next prime is 13257919. The reversal of 13257886 is 68875231.

13257886 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 an emirpimes, since its reverse is a distinct semiprime: 68875231 = 89 ⋅773879.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3314470 + ... + 3314473.

It is an arithmetic number, because the mean of its divisors is an integer number (4971708).

Almost surely, 2^13257886 is an apocalyptic number.

13257886 is a deficient number, since it is larger than the sum of its proper divisors (6628946).

13257886 is an equidigital number, since it uses as much as digits as its factorization.

13257886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6628945.

The product of its digits is 80640, while the sum is 40.

The square root of 13257886 is about 3641.1380089197. The cubic root of 13257886 is about 236.6781104916.

The spelling of 13257886 in words is "thirteen million, two hundred fifty-seven thousand, eight hundred eighty-six".