13686241 has 4 divisors (see below), whose sum is σ = 14491332. Its totient is φ = 12881152.

The previous prime is 13686229. The next prime is 13686247. The reversal of 13686241 is 14268631.

It is a happy number.

13686241 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.

It can be written as a sum of positive squares in 2 ways, for example, as 12047841 + 1638400 = 3471^2 + 1280^2 .

It is a cyclic number.

It is not a de Polignac number, because 13686241 - 2¹⁵ = 13653473 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13686247) 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, 402520 + ... + 402553.

It is an arithmetic number, because the mean of its divisors is an integer number (3622833).

Almost surely, 2^13686241 is an apocalyptic number.

It is an amenable number.

13686241 is a deficient number, since it is larger than the sum of its proper divisors (805091).

13686241 is an equidigital number, since it uses as much as digits as its factorization.

13686241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805090.

The product of its digits is 6912, while the sum is 31.

The square root of 13686241 is about 3699.4919921524. The cubic root of 13686241 is about 239.2001206641.

The spelling of 13686241 in words is "thirteen million, six hundred eighty-six thousand, two hundred forty-one".