12432129 has 4 divisors (see below), whose sum is σ = 16576176. Its totient is φ = 8288084.

The previous prime is 12432107. The next prime is 12432163. The reversal of 12432129 is 92123421.

12432129 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 a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12432129 - 2¹¹ = 12430081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12432099 and 12432108.

It is not an unprimeable number, because it can be changed into a prime (12432169) 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, 2072019 + ... + 2072024.

It is an arithmetic number, because the mean of its divisors is an integer number (4144044).

Almost surely, 2^12432129 is an apocalyptic number.

It is an amenable number.

12432129 is a deficient number, since it is larger than the sum of its proper divisors (4144047).

12432129 is an equidigital number, since it uses as much as digits as its factorization.

12432129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4144046.

The product of its digits is 864, while the sum is 24.

The square root of 12432129 is about 3525.9224324990. The cubic root of 12432129 is about 231.6586401189.

It can be divided in two parts, 12432 and 129, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 12432129 in words is "twelve million, four hundred thirty-two thousand, one hundred twenty-nine".