561043 has 4 divisors (see below), whose sum is σ = 641200. Its totient is φ = 480888.

The previous prime is 561019. The next prime is 561047. The reversal of 561043 is 340165.

561043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 561043 - 2⁹ = 560531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561043.

It is not an unprimeable number, because it can be changed into a prime (561047) 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, 40068 + ... + 40081.

It is an arithmetic number, because the mean of its divisors is an integer number (160300).

2⁵⁶¹⁰⁴³ is an apocalyptic number.

561043 is a deficient number, since it is larger than the sum of its proper divisors (80157).

561043 is an equidigital number, since it uses as much as digits as its factorization.

561043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80156.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 561043 is about 749.0280368584. The cubic root of 561043 is about 82.4768468851.

The spelling of 561043 in words is "five hundred sixty-one thousand, forty-three".