729126 has 12 divisors (see below), whose sum is σ = 1579812. Its totient is φ = 243036.

The previous prime is 729073. The next prime is 729139. The reversal of 729126 is 621927.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 729126.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20236 + ... + 20271.

It is an arithmetic number, because the mean of its divisors is an integer number (131651).

2⁷²⁹¹²⁶ is an apocalyptic number.

729126 is an abundant number, since it is smaller than the sum of its proper divisors (850686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

729126 is a wasteful number, since it uses less digits than its factorization.

729126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40515 (or 40512 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 729126 is about 853.8887515362. Note that the first 3 decimals coincide. The cubic root of 729126 is about 90.0051848865.

The spelling of 729126 in words is "seven hundred twenty-nine thousand, one hundred twenty-six".