12479729 has 4 divisors (see below), whose sum is σ = 12608484. Its totient is φ = 12350976.

The previous prime is 12479723. The next prime is 12479759. The reversal of 12479729 is 92797421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92797421 = 4871 ⋅19051.

It can be written as a sum of positive squares in 2 ways, for example, as 4906225 + 7573504 = 2215^2 + 2752^2 .

It is a cyclic number.

It is not a de Polignac number, because 12479729 - 2⁸ = 12479473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12479723) 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, 64232 + ... + 64425.

It is an arithmetic number, because the mean of its divisors is an integer number (3152121).

Almost surely, 2^12479729 is an apocalyptic number.

It is an amenable number.

12479729 is a deficient number, since it is larger than the sum of its proper divisors (128755).

12479729 is an equidigital number, since it uses as much as digits as its factorization.

12479729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128754.

The product of its digits is 63504, while the sum is 41.

The square root of 12479729 is about 3532.6659904384. The cubic root of 12479729 is about 231.9539209417.

The spelling of 12479729 in words is "twelve million, four hundred seventy-nine thousand, seven hundred twenty-nine".