561142834 has 16 divisors (see below), whose sum is σ = 1018545408. Its totient is φ = 226343232.

The previous prime is 561142801. The next prime is 561142847. The reversal of 561142834 is 438241165.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 561142834.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1178634 + ... + 1179109.

It is an arithmetic number, because the mean of its divisors is an integer number (63659088).

Almost surely, 2^561142834 is an apocalyptic number.

561142834 is a deficient number, since it is larger than the sum of its proper divisors (457402574).

561142834 is a wasteful number, since it uses less digits than its factorization.

561142834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357769.

The product of its digits is 23040, while the sum is 34.

The square root of 561142834 is about 23688.4536008580. The cubic root of 561142834 is about 824.8173867013.

Adding to 561142834 its reverse (438241165), we get a palindrome (999383999).

The spelling of 561142834 in words is "five hundred sixty-one million, one hundred forty-two thousand, eight hundred thirty-four".