12159565 has 8 divisors (see below), whose sum is σ = 15918048. Its totient is φ = 8843280.

The previous prime is 12159559. The next prime is 12159611. The reversal of 12159565 is 56595121.

12159565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12159565 - 2⁹ = 12159053 is a prime.

It is a super-4 number, since 4×12159565⁴ (a number of 29 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12159565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110487 + ... + 110596.

It is an arithmetic number, because the mean of its divisors is an integer number (1989756).

Almost surely, 2^12159565 is an apocalyptic number.

It is an amenable number.

12159565 is a deficient number, since it is larger than the sum of its proper divisors (3758483).

12159565 is a wasteful number, since it uses less digits than its factorization.

12159565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221099.

The product of its digits is 13500, while the sum is 34.

The square root of 12159565 is about 3487.0567818721. The cubic root of 12159565 is about 229.9531410525.

Subtracting 12159565 from its reverse (56595121), we obtain a square (44435556 = 6666²).

The spelling of 12159565 in words is "twelve million, one hundred fifty-nine thousand, five hundred sixty-five".