12231439 has 4 divisors (see below), whose sum is σ = 13343400. Its totient is φ = 11119480.

The previous prime is 12231433. The next prime is 12231463. The reversal of 12231439 is 93413221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93413221 = 11 ⋅8492111.

It is a cyclic number.

It is not a de Polignac number, because 12231439 - 2³ = 12231431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231431) 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, 555964 + ... + 555985.

It is an arithmetic number, because the mean of its divisors is an integer number (3335850).

Almost surely, 2^12231439 is an apocalyptic number.

12231439 is a deficient number, since it is larger than the sum of its proper divisors (1111961).

12231439 is a wasteful number, since it uses less digits than its factorization.

12231439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111960.

The product of its digits is 1296, while the sum is 25.

The square root of 12231439 is about 3497.3474234053. The cubic root of 12231439 is about 230.4053281203.

It can be divided in two parts, 1223 and 1439, that added together give a palindrome (2662).

The spelling of 12231439 in words is "twelve million, two hundred thirty-one thousand, four hundred thirty-nine".