16026561 has 24 divisors (see below), whose sum is σ = 24373440. Its totient is φ = 10128096.

The previous prime is 16026559. The next prime is 16026599. The reversal of 16026561 is 16562061.

It is a happy number.

16026561 is a `hidden beast` number, since 1 + 6 + 0 + 2 + 656 + 1 = 666.

16026561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16026561 - 2¹ = 16026559 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16026551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28495 + ... + 29051.

It is an arithmetic number, because the mean of its divisors is an integer number (1015560).

Almost surely, 2^16026561 is an apocalyptic number.

It is an amenable number.

16026561 is a deficient number, since it is larger than the sum of its proper divisors (8346879).

16026561 is a wasteful number, since it uses less digits than its factorization.

16026561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725 (or 722 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 16026561 is about 4003.3187482388. The cubic root of 16026561 is about 252.1235694048.

The spelling of 16026561 in words is "sixteen million, twenty-six thousand, five hundred sixty-one".