561164 has 12 divisors (see below), whose sum is σ = 1000944. Its totient is φ = 275184.

The previous prime is 561161. The next prime is 561173. The reversal of 561164 is 461165.

It is not an unprimeable number, because it can be changed into a prime (561161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1112 + ... + 1535.

It is an arithmetic number, because the mean of its divisors is an integer number (83412).

2⁵⁶¹¹⁶⁴ is an apocalyptic number.

It is an amenable number.

561164 is a deficient number, since it is larger than the sum of its proper divisors (439780).

561164 is a wasteful number, since it uses less digits than its factorization.

561164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704 (or 2702 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 561164 is about 749.1088038463. The cubic root of 561164 is about 82.4827757124.

Subtracting from 561164 its reverse (461165), we obtain a palindrome (99999).

The spelling of 561164 in words is "five hundred sixty-one thousand, one hundred sixty-four".