561128 has 8 divisors (see below), whose sum is σ = 1052130. Its totient is φ = 280560.

The previous prime is 561109. The next prime is 561161. The reversal of 561128 is 821165.

561128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 432964 + 128164 = 658^2 + 358^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35063 + ... + 35078.

2⁵⁶¹¹²⁸ is an apocalyptic number.

It is an amenable number.

561128 is a deficient number, since it is larger than the sum of its proper divisors (491002).

561128 is a wasteful number, since it uses less digits than its factorization.

561128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70147 (or 70143 counting only the distinct ones).

The product of its digits is 480, while the sum is 23.

The square root of 561128 is about 749.0847749087. The cubic root of 561128 is about 82.4810118529.

The spelling of 561128 in words is "five hundred sixty-one thousand, one hundred twenty-eight".