12405642429 has 4 divisors (see below), whose sum is σ = 16540856576. Its totient is φ = 8270428284.

The previous prime is 12405642371. The next prime is 12405642463. The reversal of 12405642429 is 92424650421.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92424650421 = 3 ⋅30808216807.

It is not a de Polignac number, because 12405642429 - 2⁸ = 12405642173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12405642479) 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, 2067607069 + ... + 2067607074.

It is an arithmetic number, because the mean of its divisors is an integer number (4135214144).

Almost surely, 2^12405642429 is an apocalyptic number.

It is an amenable number.

12405642429 is a deficient number, since it is larger than the sum of its proper divisors (4135214147).

12405642429 is an equidigital number, since it uses as much as digits as its factorization.

12405642429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4135214146.

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 12405642429 in words is "twelve billion, four hundred five million, six hundred forty-two thousand, four hundred twenty-nine".