16594561 has 2 divisors, whose sum is σ = 16594562. Its totient is φ = 16594560.

The previous prime is 16594559. The next prime is 16594573. The reversal of 16594561 is 16549561.

16594561 = 2880² + 2881².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8300161 + 8294400 = 2881^2 + 2880^2 .

It is a cyclic number.

It is not a de Polignac number, because 16594561 - 2¹ = 16594559 is a prime.

Together with 16594559, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16594561.

It is not a weakly prime, because it can be changed into another prime (16594531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8297280 + 8297281.

It is an arithmetic number, because the mean of its divisors is an integer number (8297281).

Almost surely, 2^16594561 is an apocalyptic number.

16594561 is the 2881-st centered square number.

It is an amenable number.

16594561 is a deficient number, since it is larger than the sum of its proper divisors (1).

16594561 is an equidigital number, since it uses as much as digits as its factorization.

16594561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 37.

The square root of 16594561 is about 4073.6422277858. The cubic root of 16594561 is about 255.0675766051.

The spelling of 16594561 in words is "sixteen million, five hundred ninety-four thousand, five hundred sixty-one".