12423431 has 6 divisors (see below), whose sum is σ = 12720960. Its totient is φ = 12132708.

The previous prime is 12423409. The next prime is 12423457. The reversal of 12423431 is 13432421.

12423431 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12423431 - 2¹⁰ = 12422407 is a prime.

It is a super-2 number, since 2×12423431² = 308683275623522, 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 (12423401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1511 + ... + 5208.

It is an arithmetic number, because the mean of its divisors is an integer number (2120160).

Almost surely, 2^12423431 is an apocalyptic number.

12423431 is a deficient number, since it is larger than the sum of its proper divisors (297529).

12423431 is an frugal number, since it uses more digits than its factorization.

12423431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6805 (or 6762 counting only the distinct ones).

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

The square root of 12423431 is about 3524.6887805876. The cubic root of 12423431 is about 231.6046017224.

Adding to 12423431 its reverse (13432421), we get a palindrome (25855852).

The spelling of 12423431 in words is "twelve million, four hundred twenty-three thousand, four hundred thirty-one".