12821245 has 4 divisors (see below), whose sum is σ = 15385500. Its totient is φ = 10256992.

The previous prime is 12821227. The next prime is 12821261. The reversal of 12821245 is 54212821.

12821245 is digitally balanced in base 3, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 7901721 + 4919524 = 2811^2 + 2218^2 .

It is a cyclic number.

It is not a de Polignac number, because 12821245 - 2⁷ = 12821117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1282120 + ... + 1282129.

It is an arithmetic number, because the mean of its divisors is an integer number (3846375).

Almost surely, 2^12821245 is an apocalyptic number.

It is an amenable number.

12821245 is a deficient number, since it is larger than the sum of its proper divisors (2564255).

12821245 is an equidigital number, since it uses as much as digits as its factorization.

12821245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564254.

The product of its digits is 1280, while the sum is 25.

The square root of 12821245 is about 3580.6766120386. The cubic root of 12821245 is about 234.0507657651.

The spelling of 12821245 in words is "twelve million, eight hundred twenty-one thousand, two hundred forty-five".