12158689 has 8 divisors (see below), whose sum is σ = 13551840. Its totient is φ = 10840896.

The previous prime is 12158669. The next prime is 12158693. The reversal of 12158689 is 98685121.

12158689 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 a cyclic number.

It is not a de Polignac number, because 12158689 - 2⁷ = 12158561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12158609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18499 + ... + 19144.

It is an arithmetic number, because the mean of its divisors is an integer number (1693980).

Almost surely, 2^12158689 is an apocalyptic number.

12158689 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12158689 is a deficient number, since it is larger than the sum of its proper divisors (1393151).

12158689 is a wasteful number, since it uses less digits than its factorization.

12158689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37679.

The product of its digits is 34560, while the sum is 40.

The square root of 12158689 is about 3486.9311722487. The cubic root of 12158689 is about 229.9476188212.

The spelling of 12158689 in words is "twelve million, one hundred fifty-eight thousand, six hundred eighty-nine".