12858705 has 12 divisors (see below), whose sum is σ = 22288500. Its totient is φ = 6857952.

The previous prime is 12858661. The next prime is 12858719. The reversal of 12858705 is 50785821.

12858705 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2047761 + 10810944 = 1431^2 + 3288^2 .

It is not a de Polignac number, because 12858705 - 2⁶ = 12858641 is a prime.

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 12858705.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142830 + ... + 142919.

It is an arithmetic number, because the mean of its divisors is an integer number (1857375).

Almost surely, 2^12858705 is an apocalyptic number.

12858705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12858705 is a deficient number, since it is larger than the sum of its proper divisors (9429795).

12858705 is a wasteful number, since it uses less digits than its factorization.

12858705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285760 (or 285757 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 12858705 is about 3585.9036518010. The cubic root of 12858705 is about 234.2784871960.

The spelling of 12858705 in words is "twelve million, eight hundred fifty-eight thousand, seven hundred five".