561042 has 24 divisors (see below), whose sum is σ = 1235520. Its totient is φ = 183960.

The previous prime is 561019. The next prime is 561047. The reversal of 561042 is 240165.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 11 ways as a sum of consecutive naturals, for example, 1059 + ... + 1497.

It is an arithmetic number, because the mean of its divisors is an integer number (51480).

2⁵⁶¹⁰⁴² is an apocalyptic number.

561042 is an abundant number, since it is smaller than the sum of its proper divisors (674478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561042 is a wasteful number, since it uses less digits than its factorization.

561042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 561042 is about 749.0273693264. The cubic root of 561042 is about 82.4767978830.

The spelling of 561042 in words is "five hundred sixty-one thousand, forty-two".