561879 has 12 divisors (see below), whose sum is σ = 819000. Its totient is φ = 371184.

The previous prime is 561839. The next prime is 561907. The reversal of 561879 is 978165.

561879 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 561879 - 2⁹ = 561367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1132 + ... + 1550.

It is an arithmetic number, because the mean of its divisors is an integer number (68250).

2⁵⁶¹⁸⁷⁹ is an apocalyptic number.

561879 is a deficient number, since it is larger than the sum of its proper divisors (257121).

561879 is a wasteful number, since it uses less digits than its factorization.

561879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574 (or 571 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 561879 is about 749.5858856729. The cubic root of 561879 is about 82.5177923058.

The spelling of 561879 in words is "five hundred sixty-one thousand, eight hundred seventy-nine".