12858889 has 4 divisors (see below), whose sum is σ = 12866256. Its totient is φ = 12851524.

The previous prime is 12858887. The next prime is 12858929. The reversal of 12858889 is 98885821.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98885821 = 17 ⋅5816813.

It is a cyclic number.

It is not a de Polignac number, because 12858889 - 2¹ = 12858887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12858883) 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, 582 + ... + 5104.

It is an arithmetic number, because the mean of its divisors is an integer number (3216564).

Almost surely, 2^12858889 is an apocalyptic number.

It is an amenable number.

12858889 is a deficient number, since it is larger than the sum of its proper divisors (7367).

12858889 is an equidigital number, since it uses as much as digits as its factorization.

12858889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7366.

The product of its digits is 368640, while the sum is 49.

The square root of 12858889 is about 3585.9293077248. The cubic root of 12858889 is about 234.2796046500.

The spelling of 12858889 in words is "twelve million, eight hundred fifty-eight thousand, eight hundred eighty-nine".