12130581 has 4 divisors (see below), whose sum is σ = 16174112. Its totient is φ = 8087052.

The previous prime is 12130567. The next prime is 12130583. The reversal of 12130581 is 18503121.

12130581 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12130581 - 2¹³ = 12122389 is a prime.

It is a super-2 number, since 2×12130581² = 294301990795122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12130583) 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, 2021761 + ... + 2021766.

It is an arithmetic number, because the mean of its divisors is an integer number (4043528).

Almost surely, 2^12130581 is an apocalyptic number.

It is an amenable number.

12130581 is a deficient number, since it is larger than the sum of its proper divisors (4043531).

12130581 is an equidigital number, since it uses as much as digits as its factorization.

12130581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043530.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 12130581 is about 3482.8983619968. The cubic root of 12130581 is about 229.7702873489.

The spelling of 12130581 in words is "twelve million, one hundred thirty thousand, five hundred eighty-one".