1161564 has 12 divisors (see below), whose sum is σ = 2710344. Its totient is φ = 387184.

The previous prime is 1161553. The next prime is 1161581. The reversal of 1161564 is 4651611.

It is a tau number, because it is divible by the number of its divisors (12).

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48387 + ... + 48410.

It is an arithmetic number, because the mean of its divisors is an integer number (225862).

2^1161564 is an apocalyptic number.

It is an amenable number.

1161564 is an abundant number, since it is smaller than the sum of its proper divisors (1548780).

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

1161564 is a wasteful number, since it uses less digits than its factorization.

1161564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96804 (or 96802 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 1161564 is about 1077.7587856288. The cubic root of 1161564 is about 105.1189581478.

The spelling of 1161564 in words is "one million, one hundred sixty-one thousand, five hundred sixty-four".