13286861 has 4 divisors (see below), whose sum is σ = 15184992. Its totient is φ = 11388732.

The previous prime is 13286857. The next prime is 13286863. The reversal of 13286861 is 16868231.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16868231 = 757 ⋅22283.

It is a cyclic number.

It is not a de Polignac number, because 13286861 - 2² = 13286857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13286863) 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, 949055 + ... + 949068.

It is an arithmetic number, because the mean of its divisors is an integer number (3796248).

Almost surely, 2^13286861 is an apocalyptic number.

It is an amenable number.

13286861 is a deficient number, since it is larger than the sum of its proper divisors (1898131).

13286861 is an equidigital number, since it uses as much as digits as its factorization.

13286861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898130.

The product of its digits is 13824, while the sum is 35.

The square root of 13286861 is about 3645.1146758367. The cubic root of 13286861 is about 236.8504043867.

The spelling of 13286861 in words is "thirteen million, two hundred eighty-six thousand, eight hundred sixty-one".