561044 has 24 divisors (see below), whose sum is σ = 1100736. Its totient is φ = 248000.

The previous prime is 561019. The next prime is 561047. The reversal of 561044 is 440165.

It is a happy number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1649 + ... + 1959.

It is an arithmetic number, because the mean of its divisors is an integer number (45864).

2⁵⁶¹⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

561044 is a deficient number, since it is larger than the sum of its proper divisors (539692).

561044 is a wasteful number, since it uses less digits than its factorization.

561044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 561044 is about 749.0287043899. The cubic root of 561044 is about 82.4768958872.

The spelling of 561044 in words is "five hundred sixty-one thousand, forty-four".