12429709 has 4 divisors (see below), whose sum is σ = 12718816. Its totient is φ = 12140604.

The previous prime is 12429691. The next prime is 12429727. The reversal of 12429709 is 90792421.

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.

It is an interprime number because it is at equal distance from previous prime (12429691) and next prime (12429727).

It is a cyclic number.

It is not a de Polignac number, because 12429709 - 2¹¹ = 12427661 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 (12429749) 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, 144489 + ... + 144574.

It is an arithmetic number, because the mean of its divisors is an integer number (3179704).

Almost surely, 2^12429709 is an apocalyptic number.

It is an amenable number.

12429709 is a deficient number, since it is larger than the sum of its proper divisors (289107).

12429709 is an equidigital number, since it uses as much as digits as its factorization.

12429709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289106.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 12429709 is about 3525.5792431883. The cubic root of 12429709 is about 231.6436078240.

The spelling of 12429709 in words is "twelve million, four hundred twenty-nine thousand, seven hundred nine".