12820611 has 16 divisors (see below), whose sum is σ = 18483200. Its totient is φ = 7877088.

The previous prime is 12820603. The next prime is 12820631. The reversal of 12820611 is 11602821.

It is not a de Polignac number, because 12820611 - 2³ = 12820603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12820631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 931 + ... + 5148.

It is an arithmetic number, because the mean of its divisors is an integer number (1155200).

Almost surely, 2^12820611 is an apocalyptic number.

12820611 is a deficient number, since it is larger than the sum of its proper divisors (5662589).

12820611 is a wasteful number, since it uses less digits than its factorization.

12820611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6138.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 12820611 is about 3580.5880801902. The cubic root of 12820611 is about 234.0469078290.

It can be divided in two parts, 12820 and 611, that added together give a palindrome (13431).

The spelling of 12820611 in words is "twelve million, eight hundred twenty thousand, six hundred eleven".