12109559 has 36 divisors (see below), whose sum is σ = 16681392. Its totient is φ = 8574720.

The previous prime is 12109553. The next prime is 12109571. The reversal of 12109559 is 95590121.

12109559 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12109559 - 2⁴ = 12109543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12109553) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 417557 + ... + 417585.

It is an arithmetic number, because the mean of its divisors is an integer number (463372).

Almost surely, 2^12109559 is an apocalyptic number.

12109559 is a deficient number, since it is larger than the sum of its proper divisors (4571833).

12109559 is a wasteful number, since it uses less digits than its factorization.

12109559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 12109559 is about 3479.8791645688. The cubic root of 12109559 is about 229.6374818415.

The spelling of 12109559 in words is "twelve million, one hundred nine thousand, five hundred fifty-nine".