12012431 has 4 divisors (see below), whose sum is σ = 12019392. Its totient is φ = 12005472.

The previous prime is 12012367. The next prime is 12012433. The reversal of 12012431 is 13421021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12012431 - 2⁶ = 12012367 is a prime.

It is a super-2 number, since 2×12012431² = 288596997059522, 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 (12012433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271 + ... + 5063.

It is an arithmetic number, because the mean of its divisors is an integer number (3004848).

Almost surely, 2^12012431 is an apocalyptic number.

12012431 is a deficient number, since it is larger than the sum of its proper divisors (6961).

12012431 is an equidigital number, since it uses as much as digits as its factorization.

12012431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6960.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 12012431 is about 3465.8954110013. The cubic root of 12012431 is about 229.0218764656.

Adding to 12012431 its reverse (13421021), we get a palindrome (25433452).

The spelling of 12012431 in words is "twelve million, twelve thousand, four hundred thirty-one".