12957806 has 8 divisors (see below), whose sum is σ = 19850400. Its totient is φ = 6341008.

The previous prime is 12957797. The next prime is 12957821. The reversal of 12957806 is 60875921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12957806.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 68831 + ... + 69018.

It is an arithmetic number, because the mean of its divisors is an integer number (2481300).

Almost surely, 2^12957806 is an apocalyptic number.

12957806 is a deficient number, since it is larger than the sum of its proper divisors (6892594).

12957806 is a wasteful number, since it uses less digits than its factorization.

12957806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137898.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 12957806 is about 3599.6952648801. The cubic root of 12957806 is about 234.8788027536.

The spelling of 12957806 in words is "twelve million, nine hundred fifty-seven thousand, eight hundred six".