12342431 has 4 divisors (see below), whose sum is σ = 12481200. Its totient is φ = 12203664.

The previous prime is 12342409. The next prime is 12342437. The reversal of 12342431 is 13424321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13424321 = 67 ⋅200363.

It is a cyclic number.

It is not a de Polignac number, because 12342431 - 2⁶ = 12342367 is a prime.

It is a super-2 number, since 2×12342431² = 304671205979522, 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 (12342437) 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, 69251 + ... + 69428.

It is an arithmetic number, because the mean of its divisors is an integer number (3120300).

Almost surely, 2^12342431 is an apocalyptic number.

12342431 is a deficient number, since it is larger than the sum of its proper divisors (138769).

12342431 is an equidigital number, since it uses as much as digits as its factorization.

12342431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138768.

The product of its digits is 576, while the sum is 20.

The square root of 12342431 is about 3513.1796139680. The cubic root of 12342431 is about 231.1001545920.

Adding to 12342431 its reverse (13424321), we get a palindrome (25766752).

It can be divided in two parts, 1 and 2342431, that added together give a palindrome (2342432).

The spelling of 12342431 in words is "twelve million, three hundred forty-two thousand, four hundred thirty-one".