1155564 has 18 divisors (see below), whose sum is σ = 2921100. Its totient is φ = 385176.

The previous prime is 1155529. The next prime is 1155569. The reversal of 1155564 is 4655511.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (1155569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16014 + ... + 16085.

2^1155564 is an apocalyptic number.

It is an amenable number.

1155564 is an abundant number, since it is smaller than the sum of its proper divisors (1765536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155564 is a wasteful number, since it uses less digits than its factorization.

1155564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32109 (or 32104 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 1155564 is about 1074.9716275326. The cubic root of 1155564 is about 104.9376500582.

The spelling of 1155564 in words is "one million, one hundred fifty-five thousand, five hundred sixty-four".