561964 has 24 divisors (see below), whose sum is σ = 1079568. Its totient is φ = 254400.

The previous prime is 561961. The next prime is 561973. The reversal of 561964 is 469165.

It is not an unprimeable number, because it can be changed into a prime (561961) 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, 5199 + ... + 5305.

It is an arithmetic number, because the mean of its divisors is an integer number (44982).

2⁵⁶¹⁹⁶⁴ is an apocalyptic number.

It is an amenable number.

561964 is a deficient number, since it is larger than the sum of its proper divisors (517604).

561964 is a wasteful number, since it uses less digits than its factorization.

561964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 223 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 561964 is about 749.6425815013. The cubic root of 561964 is about 82.5219531416.

The spelling of 561964 in words is "five hundred sixty-one thousand, nine hundred sixty-four".