12665031 has 4 divisors (see below), whose sum is σ = 16886712. Its totient is φ = 8443352.

The previous prime is 12664997. The next prime is 12665041. The reversal of 12665031 is 13056621.

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 12665031 - 2⁷ = 12664903 is a prime.

It is a super-2 number, since 2×12665031² = 320806020461922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12664992 and 12665010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12665041) 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, 2110836 + ... + 2110841.

It is an arithmetic number, because the mean of its divisors is an integer number (4221678).

Almost surely, 2^12665031 is an apocalyptic number.

12665031 is a deficient number, since it is larger than the sum of its proper divisors (4221681).

12665031 is an equidigital number, since it uses as much as digits as its factorization.

12665031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4221680.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 12665031 is about 3558.7962852628. The cubic root of 12665031 is about 233.0963210102.

The spelling of 12665031 in words is "twelve million, six hundred sixty-five thousand, thirty-one".