561116 has 12 divisors (see below), whose sum is σ = 989520. Its totient is φ = 278400.

The previous prime is 561109. The next prime is 561161. The reversal of 561116 is 611165.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

561116 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140 + ... + 1068.

It is an arithmetic number, because the mean of its divisors is an integer number (82460).

2⁵⁶¹¹¹⁶ is an apocalyptic number.

It is an amenable number.

561116 is a deficient number, since it is larger than the sum of its proper divisors (428404).

561116 is a wasteful number, since it uses less digits than its factorization.

561116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 1082 counting only the distinct ones).

The product of its digits is 180, while the sum is 20.

The square root of 561116 is about 749.0767650915. The cubic root of 561116 is about 82.4804238829.

The spelling of 561116 in words is "five hundred sixty-one thousand, one hundred sixteen".