12812885 has 8 divisors (see below), whose sum is σ = 15548760. Its totient is φ = 10134784.

The previous prime is 12812861. The next prime is 12812893. The reversal of 12812885 is 58821821.

It can be written as a sum of positive squares in 4 ways, for example, as 17956 + 12794929 = 134^2 + 3577^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12812885 - 2⁸ = 12812629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13952 + ... + 14841.

It is an arithmetic number, because the mean of its divisors is an integer number (1943595).

Almost surely, 2^12812885 is an apocalyptic number.

It is an amenable number.

12812885 is a deficient number, since it is larger than the sum of its proper divisors (2735875).

12812885 is an equidigital number, since it uses as much as digits as its factorization.

12812885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28887.

The product of its digits is 10240, while the sum is 35.

The square root of 12812885 is about 3579.5090445479. The cubic root of 12812885 is about 233.9998843353. Note that the first 3 decimals are identical.

The spelling of 12812885 in words is "twelve million, eight hundred twelve thousand, eight hundred eighty-five".