12920611 has 4 divisors (see below), whose sum is σ = 14095224. Its totient is φ = 11746000.

The previous prime is 12920581. The next prime is 12920647. The reversal of 12920611 is 11602921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12920611 - 2⁷ = 12920483 is a prime.

It is a super-2 number, since 2×12920611² = 333884377226642, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12920671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587290 + ... + 587311.

It is an arithmetic number, because the mean of its divisors is an integer number (3523806).

Almost surely, 2^12920611 is an apocalyptic number.

12920611 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12920611 is a deficient number, since it is larger than the sum of its proper divisors (1174613).

12920611 is a wasteful number, since it uses less digits than its factorization.

12920611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174612.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 12920611 is about 3594.5251424910. The cubic root of 12920611 is about 234.6538498169.

It can be divided in two parts, 12920 and 611, that added together give a palindrome (13531).

The spelling of 12920611 in words is "twelve million, nine hundred twenty thousand, six hundred eleven".