12130805 has 8 divisors (see below), whose sum is σ = 14581944. Its totient is φ = 9688000.

The previous prime is 12130771. The next prime is 12130849. The reversal of 12130805 is 50803121.

12130805 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1522756 + 10608049 = 1234^2 + 3257^2 .

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

It is not a de Polignac number, because 12130805 - 2¹⁰ = 12129781 is a prime.

It is a Duffinian number.

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, 1775 + ... + 5235.

It is an arithmetic number, because the mean of its divisors is an integer number (1822743).

Almost surely, 2^12130805 is an apocalyptic number.

It is an amenable number.

12130805 is a deficient number, since it is larger than the sum of its proper divisors (2451139).

12130805 is an equidigital number, since it uses as much as digits as its factorization.

With its predecessor (12130804) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (4167).

12130805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4167.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 12130805 is about 3482.9305189739. The cubic root of 12130805 is about 229.7717016320.

Adding to 12130805 its reverse (50803121), we get a palindrome (62933926).

The spelling of 12130805 in words is "twelve million, one hundred thirty thousand, eight hundred five".