13566261 has 8 divisors (see below), whose sum is σ = 18219040. Its totient is φ = 8978832.

The previous prime is 13566257. The next prime is 13566263. The reversal of 13566261 is 16266531.

13566261 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 13566261 - 2² = 13566257 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 (13566263) 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, 15850 + ... + 16683.

It is an arithmetic number, because the mean of its divisors is an integer number (2277380).

Almost surely, 2^13566261 is an apocalyptic number.

It is an amenable number.

13566261 is a deficient number, since it is larger than the sum of its proper divisors (4652779).

13566261 is a wasteful number, since it uses less digits than its factorization.

13566261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32675.

The product of its digits is 6480, while the sum is 30.

The square root of 13566261 is about 3683.2405569009. The cubic root of 13566261 is about 238.4990880249.

The spelling of 13566261 in words is "thirteen million, five hundred sixty-six thousand, two hundred sixty-one".