12912729 has 8 divisors (see below), whose sum is σ = 17965632. Its totient is φ = 8234160.

The previous prime is 12912719. The next prime is 12912769. The reversal of 12912729 is 92721921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12912729 - 2¹² = 12908633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12912729.

It is not an unprimeable number, because it can be changed into a prime (12912719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93502 + ... + 93639.

It is an arithmetic number, because the mean of its divisors is an integer number (2245704).

Almost surely, 2^12912729 is an apocalyptic number.

It is an amenable number.

12912729 is a deficient number, since it is larger than the sum of its proper divisors (5052903).

12912729 is a wasteful number, since it uses less digits than its factorization.

12912729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187167.

The product of its digits is 4536, while the sum is 33.

The square root of 12912729 is about 3593.4285856268. The cubic root of 12912729 is about 234.6061245747.

The spelling of 12912729 in words is "twelve million, nine hundred twelve thousand, seven hundred twenty-nine".