12125729 has 8 divisors (see below), whose sum is σ = 15117888. Its totient is φ = 9448560.

The previous prime is 12125723. The next prime is 12125731. The reversal of 12125729 is 92752121.

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

It is a de Polignac number, because none of the positive numbers 2^k-12125729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12125723) 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, 78662 + ... + 78815.

It is an arithmetic number, because the mean of its divisors is an integer number (1889736).

Almost surely, 2^12125729 is an apocalyptic number.

It is an amenable number.

12125729 is a deficient number, since it is larger than the sum of its proper divisors (2992159).

12125729 is a wasteful number, since it uses less digits than its factorization.

12125729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157495.

The product of its digits is 2520, while the sum is 29.

The square root of 12125729 is about 3482.2017460222. The cubic root of 12125729 is about 229.7396486926.

The spelling of 12125729 in words is "twelve million, one hundred twenty-five thousand, seven hundred twenty-nine".