12645857 has 4 divisors (see below), whose sum is σ = 14452416. Its totient is φ = 10839300.

The previous prime is 12645833. The next prime is 12645859. The reversal of 12645857 is 75854621.

12645857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12645857 - 2¹⁸ = 12383713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12645857.

It is not an unprimeable number, because it can be changed into a prime (12645859) 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, 903269 + ... + 903282.

It is an arithmetic number, because the mean of its divisors is an integer number (3613104).

Almost surely, 2^12645857 is an apocalyptic number.

It is an amenable number.

12645857 is a deficient number, since it is larger than the sum of its proper divisors (1806559).

12645857 is an equidigital number, since it uses as much as digits as its factorization.

12645857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806558.

The product of its digits is 67200, while the sum is 38.

The square root of 12645857 is about 3556.1013765077. The cubic root of 12645857 is about 232.9786309125.

The spelling of 12645857 in words is "twelve million, six hundred forty-five thousand, eight hundred fifty-seven".