128564 has 6 divisors (see below), whose sum is σ = 224994. Its totient is φ = 64280.

The previous prime is 128563. The next prime is 128591. The reversal of 128564 is 465821.

It can be written as a sum of positive squares in only one way, i.e., 128164 + 400 = 358^2 + 20^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16067 + ... + 16074.

It is an arithmetic number, because the mean of its divisors is an integer number (37499).

2¹²⁸⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

128564 is a deficient number, since it is larger than the sum of its proper divisors (96430).

128564 is a wasteful number, since it uses less digits than its factorization.

128564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32145 (or 32143 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 128564 is about 358.5582240027. The cubic root of 128564 is about 50.4707539054.

The spelling of 128564 in words is "one hundred twenty-eight thousand, five hundred sixty-four".