12165887 has 4 divisors (see below), whose sum is σ = 12209160. Its totient is φ = 12122616.

The previous prime is 12165869. The next prime is 12165893. The reversal of 12165887 is 78856121.

12165887 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12165887 - 2⁶ = 12165823 is a prime.

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 12165887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12165287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21212 + ... + 21777.

It is an arithmetic number, because the mean of its divisors is an integer number (3052290).

Almost surely, 2^12165887 is an apocalyptic number.

12165887 is a deficient number, since it is larger than the sum of its proper divisors (43273).

12165887 is an equidigital number, since it uses as much as digits as its factorization.

12165887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43272.

The product of its digits is 26880, while the sum is 38.

The square root of 12165887 is about 3487.9631592091. The cubic root of 12165887 is about 229.9929865536.

The spelling of 12165887 in words is "twelve million, one hundred sixty-five thousand, eight hundred eighty-seven".