5806561 has 2 divisors, whose sum is σ = 5806562. Its totient is φ = 5806560.

The previous prime is 5806547. The next prime is 5806613. The reversal of 5806561 is 1656085.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5688225 + 118336 = 2385^2 + 344^2 .

It is a cyclic number.

It is not a de Polignac number, because 5806561 - 2⁹ = 5806049 is a prime.

It is not a weakly prime, because it can be changed into another prime (5806531) 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 as a sum of consecutive naturals, namely, 2903280 + 2903281.

It is an arithmetic number, because the mean of its divisors is an integer number (2903281).

Almost surely, 2^5806561 is an apocalyptic number.

It is an amenable number.

5806561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5806561 is an equidigital number, since it uses as much as digits as its factorization.

5806561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 5806561 is about 2409.6806842401. The cubic root of 5806561 is about 179.7379004328.

The spelling of 5806561 in words is "five million, eight hundred six thousand, five hundred sixty-one".