561579 has 4 divisors (see below), whose sum is σ = 748776. Its totient is φ = 374384.

The previous prime is 561559. The next prime is 561599. The reversal of 561579 is 975165.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (561559) and next prime (561599).

It is a cyclic number.

It is not a de Polignac number, because 561579 - 2¹² = 557483 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (561529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93594 + ... + 93599.

It is an arithmetic number, because the mean of its divisors is an integer number (187194).

2⁵⁶¹⁵⁷⁹ is an apocalyptic number.

561579 is a deficient number, since it is larger than the sum of its proper divisors (187197).

561579 is a wasteful number, since it uses less digits than its factorization.

561579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187196.

The product of its digits is 9450, while the sum is 33.

The square root of 561579 is about 749.3857484634. The cubic root of 561579 is about 82.5031036482.

The spelling of 561579 in words is "five hundred sixty-one thousand, five hundred seventy-nine".