15164561 has 8 divisors (see below), whose sum is σ = 16491240. Its totient is φ = 13886208.

The previous prime is 15164551. The next prime is 15164563. The reversal of 15164561 is 16546151.

15164561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8300161 + 6864400 = 2881^2 + 2620^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 15164561 - 2⁶ = 15164497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15164563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11426 + ... + 12683.

It is an arithmetic number, because the mean of its divisors is an integer number (2061405).

Almost surely, 2^15164561 is an apocalyptic number.

It is an amenable number.

15164561 is a deficient number, since it is larger than the sum of its proper divisors (1326679).

15164561 is a wasteful number, since it uses less digits than its factorization.

15164561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24163.

The product of its digits is 3600, while the sum is 29.

The square root of 15164561 is about 3894.1701298223. The cubic root of 15164561 is about 247.5198011570.

The spelling of 15164561 in words is "fifteen million, one hundred sixty-four thousand, five hundred sixty-one".