12531423 has 16 divisors (see below), whose sum is σ = 17216640. Its totient is φ = 8104224.

The previous prime is 12531391. The next prime is 12531437. The reversal of 12531423 is 32413521.

It is not a de Polignac number, because 12531423 - 2⁵ = 12531391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12531423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12531443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14265 + ... + 15117.

It is an arithmetic number, because the mean of its divisors is an integer number (1076040).

Almost surely, 2^12531423 is an apocalyptic number.

12531423 is a deficient number, since it is larger than the sum of its proper divisors (4685217).

12531423 is an equidigital number, since it uses as much as digits as its factorization.

12531423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998.

The product of its digits is 720, while the sum is 21.

The square root of 12531423 is about 3539.9749999117. The cubic root of 12531423 is about 232.2737491467.

Adding to 12531423 its reverse (32413521), we get a palindrome (44944944).

The spelling of 12531423 in words is "twelve million, five hundred thirty-one thousand, four hundred twenty-three".