12127865 has 16 divisors (see below), whose sum is σ = 14929920. Its totient is φ = 9455040.

The previous prime is 12127861. The next prime is 12127873. The reversal of 12127865 is 56872121.

It is not a de Polignac number, because 12127865 - 2² = 12127861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12127861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44951 + ... + 45219.

It is an arithmetic number, because the mean of its divisors is an integer number (933120).

Almost surely, 2^12127865 is an apocalyptic number.

It is an amenable number.

12127865 is a deficient number, since it is larger than the sum of its proper divisors (2802055).

12127865 is a wasteful number, since it uses less digits than its factorization.

12127865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472.

The product of its digits is 6720, while the sum is 32.

The square root of 12127865 is about 3482.5084350221. The cubic root of 12127865 is about 229.7531377806.

Adding to 12127865 its reverse (56872121), we get a palindrome (68999986).

The spelling of 12127865 in words is "twelve million, one hundred twenty-seven thousand, eight hundred sixty-five".