12159564 has 24 divisors (see below), whose sum is σ = 29288448. Its totient is φ = 3922320.

The previous prime is 12159559. The next prime is 12159611. The reversal of 12159564 is 46595121.

It is a super-4 number, since 4×12159564⁴ (a number of 29 digits) contains 4444 as substring.

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 7 ways as a sum of consecutive naturals, for example, 15972 + ... + 16715.

It is an arithmetic number, because the mean of its divisors is an integer number (1220352).

Almost surely, 2^12159564 is an apocalyptic number.

It is an amenable number.

12159564 is an abundant number, since it is smaller than the sum of its proper divisors (17128884).

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

12159564 is a wasteful number, since it uses less digits than its factorization.

12159564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32725 (or 32723 counting only the distinct ones).

The product of its digits is 10800, while the sum is 33.

The square root of 12159564 is about 3487.0566384847. The cubic root of 12159564 is about 229.9531347487.

It can be divided in two parts, 121 and 59564, that added together give a triangular number (59685 = T₃₄₅).

The spelling of 12159564 in words is "twelve million, one hundred fifty-nine thousand, five hundred sixty-four".