12942729 has 24 divisors (see below), whose sum is σ = 20484360. Its totient is φ = 7838208.

The previous prime is 12942701. The next prime is 12942737. The reversal of 12942729 is 92724921.

It can be written as a sum of positive squares in 4 ways, for example, as 8277129 + 4665600 = 2877^2 + 2160^2 .

It is not a de Polignac number, because 12942729 - 2⁸ = 12942473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12942693 and 12942702.

It is not an unprimeable number, because it can be changed into a prime (12942739) 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 23 ways as a sum of consecutive naturals, for example, 2979 + ... + 5895.

It is an arithmetic number, because the mean of its divisors is an integer number (853515).

Almost surely, 2^12942729 is an apocalyptic number.

It is an amenable number.

12942729 is a deficient number, since it is larger than the sum of its proper divisors (7541631).

12942729 is a wasteful number, since it uses less digits than its factorization.

12942729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2969 (or 2966 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 12942729 is about 3597.6004503002. The cubic root of 12942729 is about 234.7876699884.

The spelling of 12942729 in words is "twelve million, nine hundred forty-two thousand, seven hundred twenty-nine".