12429809 has 4 divisors (see below), whose sum is σ = 14205504. Its totient is φ = 10654116.

The previous prime is 12429803. The next prime is 12429811. The reversal of 12429809 is 90892421.

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: 90892421 = 17 ⋅5346613.

It is a cyclic number.

It is not a de Polignac number, because 12429809 - 2⁴ = 12429793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12429803) 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, 887837 + ... + 887850.

It is an arithmetic number, because the mean of its divisors is an integer number (3551376).

Almost surely, 2^12429809 is an apocalyptic number.

It is an amenable number.

12429809 is a deficient number, since it is larger than the sum of its proper divisors (1775695).

12429809 is an equidigital number, since it uses as much as digits as its factorization.

12429809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775694.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 12429809 is about 3525.5934252265. The cubic root of 12429809 is about 231.6442290319.

The spelling of 12429809 in words is "twelve million, four hundred twenty-nine thousand, eight hundred nine".