12131869 has 4 divisors (see below), whose sum is σ = 12186496. Its totient is φ = 12077244.

The previous prime is 12131849. The next prime is 12131909. The reversal of 12131869 is 96813121.

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 a cyclic number.

It is not a de Polignac number, because 12131869 - 2⁵ = 12131837 is a prime.

It is a super-2 number, since 2×12131869² = 294364490866322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12131869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26979 + ... + 27424.

It is an arithmetic number, because the mean of its divisors is an integer number (3046624).

Almost surely, 2^12131869 is an apocalyptic number.

It is an amenable number.

12131869 is a deficient number, since it is larger than the sum of its proper divisors (54627).

12131869 is an equidigital number, since it uses as much as digits as its factorization.

12131869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54626.

The product of its digits is 2592, while the sum is 31.

The square root of 12131869 is about 3483.0832605610. The cubic root of 12131869 is about 229.7784192390.

The spelling of 12131869 in words is "twelve million, one hundred thirty-one thousand, eight hundred sixty-nine".