12434431 has 4 divisors (see below), whose sum is σ = 12483072. Its totient is φ = 12385792.

The previous prime is 12434369. The next prime is 12434447. The reversal of 12434431 is 13443421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13443421 = 409 ⋅32869.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12434431 is a prime.

It is a super-2 number, since 2×12434431² = 309230148587522, 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 (12434491) 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, 23935 + ... + 24448.

It is an arithmetic number, because the mean of its divisors is an integer number (3120768).

Almost surely, 2^12434431 is an apocalyptic number.

12434431 is a deficient number, since it is larger than the sum of its proper divisors (48641).

12434431 is an equidigital number, since it uses as much as digits as its factorization.

12434431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48640.

The product of its digits is 1152, while the sum is 22.

The square root of 12434431 is about 3526.2488567882. The cubic root of 12434431 is about 231.6729376239.

Adding to 12434431 its reverse (13443421), we get a palindrome (25877852).

The spelling of 12434431 in words is "twelve million, four hundred thirty-four thousand, four hundred thirty-one".