13661259 has 8 divisors (see below), whose sum is σ = 18280512. Its totient is φ = 9074760.

The previous prime is 13661237. The next prime is 13661261. The reversal of 13661259 is 95216631.

It is a happy number.

13661259 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13661259 - 2⁸ = 13661003 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (13661269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7197 + ... + 8894.

It is an arithmetic number, because the mean of its divisors is an integer number (2285064).

Almost surely, 2^13661259 is an apocalyptic number.

13661259 is a deficient number, since it is larger than the sum of its proper divisors (4619253).

13661259 is a wasteful number, since it uses less digits than its factorization.

13661259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16377.

The product of its digits is 9720, while the sum is 33.

The square root of 13661259 is about 3696.1140404484. The cubic root of 13661259 is about 239.0544917562.

The spelling of 13661259 in words is "thirteen million, six hundred sixty-one thousand, two hundred fifty-nine".