561599 has 2 divisors, whose sum is σ = 561600. Its totient is φ = 561598.

The previous prime is 561559. The next prime is 561607. The reversal of 561599 is 995165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561599 - 2⁸ = 561343 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561529) 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, 280799 + 280800.

It is an arithmetic number, because the mean of its divisors is an integer number (280800).

2⁵⁶¹⁵⁹⁹ is an apocalyptic number.

561599 is a deficient number, since it is larger than the sum of its proper divisors (1).

561599 is an equidigital number, since it uses as much as digits as its factorization.

561599 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12150, while the sum is 35.

The square root of 561599 is about 749.3990926069. The cubic root of 561599 is about 82.5040830547.

The spelling of 561599 in words is "five hundred sixty-one thousand, five hundred ninety-nine".