12432531 has 4 divisors (see below), whose sum is σ = 16576712. Its totient is φ = 8288352.

The previous prime is 12432527. The next prime is 12432533. The reversal of 12432531 is 13523421.

12432531 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12432531 - 2² = 12432527 is a prime.

It is a super-2 number, since 2×12432531² = 309135654131922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12432498 and 12432507.

It is not an unprimeable number, because it can be changed into a prime (12432533) 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, 2072086 + ... + 2072091.

It is an arithmetic number, because the mean of its divisors is an integer number (4144178).

Almost surely, 2^12432531 is an apocalyptic number.

12432531 is a deficient number, since it is larger than the sum of its proper divisors (4144181).

12432531 is an equidigital number, since it uses as much as digits as its factorization.

12432531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4144180.

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

The square root of 12432531 is about 3525.9794383972. The cubic root of 12432531 is about 231.6611370302.

Adding to 12432531 its reverse (13523421), we get a palindrome (25955952).

The spelling of 12432531 in words is "twelve million, four hundred thirty-two thousand, five hundred thirty-one".