15358561 has 3 divisors (see below), whose sum is σ = 15362481. Its totient is φ = 15354642.

The previous prime is 15358537. The next prime is 15358591. The reversal of 15358561 is 16585351.

The square root of 15358561 is 3919.

It is a perfect power (a square), and thus also a powerful number.

15358561 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, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 15358561 - 2⁵ = 15358529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15358591) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1960 + ... + 5878.

It is an arithmetic number, because the mean of its divisors is an integer number (5120827).

Almost surely, 2^15358561 is an apocalyptic number.

15358561 is the 3919-th square number.

15358561 is the 1960-th centered octagonal number.

It is an amenable number.

15358561 is a deficient number, since it is larger than the sum of its proper divisors (3920).

15358561 is an frugal number, since it uses more digits than its factorization.

15358561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7838 (or 3919 counting only the distinct ones).

The product of its digits is 18000, while the sum is 34.

The cubic root of 15358561 is about 248.5708375471.

The spelling of 15358561 in words is "fifteen million, three hundred fifty-eight thousand, five hundred sixty-one".