12289429 has 4 divisors (see below), whose sum is σ = 12823776. Its totient is φ = 11755084.

The previous prime is 12289427. The next prime is 12289441. The reversal of 12289429 is 92498221.

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 12289429 - 2¹ = 12289427 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12289427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267139 + ... + 267184.

It is an arithmetic number, because the mean of its divisors is an integer number (3205944).

Almost surely, 2^12289429 is an apocalyptic number.

It is an amenable number.

12289429 is a deficient number, since it is larger than the sum of its proper divisors (534347).

12289429 is an equidigital number, since it uses as much as digits as its factorization.

12289429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534346.

The product of its digits is 20736, while the sum is 37.

The square root of 12289429 is about 3505.6281890697. The cubic root of 12289429 is about 230.7688761049.

The spelling of 12289429 in words is "twelve million, two hundred eighty-nine thousand, four hundred twenty-nine".