12681865 has 8 divisors (see below), whose sum is σ = 17392320. Its totient is φ = 8696112.

The previous prime is 12681859. The next prime is 12681871. The reversal of 12681865 is 56818621.

It is an interprime number because it is at equal distance from previous prime (12681859) and next prime (12681871).

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 12681865 - 2⁹ = 12681353 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181135 + ... + 181204.

It is an arithmetic number, because the mean of its divisors is an integer number (2174040).

Almost surely, 2^12681865 is an apocalyptic number.

It is an amenable number.

12681865 is a deficient number, since it is larger than the sum of its proper divisors (4710455).

12681865 is an equidigital number, since it uses as much as digits as its factorization.

12681865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362351.

The product of its digits is 23040, while the sum is 37.

The square root of 12681865 is about 3561.1606254141. The cubic root of 12681865 is about 233.1995502935.

The spelling of 12681865 in words is "twelve million, six hundred eighty-one thousand, eight hundred sixty-five".