12105431 has 8 divisors (see below), whose sum is σ = 13157760. Its totient is φ = 11070432.

The previous prime is 12105427. The next prime is 12105433. The reversal of 12105431 is 13450121.

12105431 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12105431 - 2² = 12105427 is a prime.

It is a super-3 number, since 3×12105431³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12105433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2855 + ... + 5688.

It is an arithmetic number, because the mean of its divisors is an integer number (1644720).

Almost surely, 2^12105431 is an apocalyptic number.

12105431 is a deficient number, since it is larger than the sum of its proper divisors (1052329).

12105431 is a wasteful number, since it uses less digits than its factorization.

12105431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8665.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 12105431 is about 3479.2859899698. The cubic root of 12105431 is about 229.6113853431.

Adding to 12105431 its reverse (13450121), we get a palindrome (25555552).

The spelling of 12105431 in words is "twelve million, one hundred five thousand, four hundred thirty-one".