12667865 has 16 divisors (see below), whose sum is σ = 17532288. Its totient is φ = 8606976.

The previous prime is 12667861. The next prime is 12667877. The reversal of 12667865 is 56876621.

12667865 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12667865 - 2² = 12667861 is a prime.

It is a Duffinian number.

12667865 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (12667861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2354 + ... + 5556.

It is an arithmetic number, because the mean of its divisors is an integer number (1095768).

Almost surely, 2^12667865 is an apocalyptic number.

It is an amenable number.

12667865 is a deficient number, since it is larger than the sum of its proper divisors (4864423).

12667865 is a wasteful number, since it uses less digits than its factorization.

12667865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3328.

The product of its digits is 120960, while the sum is 41.

The square root of 12667865 is about 3559.1944313285. The cubic root of 12667865 is about 233.1137060369.

The spelling of 12667865 in words is "twelve million, six hundred sixty-seven thousand, eight hundred sixty-five".