256729126 has 32 divisors (see below), whose sum is σ = 405917568. Its totient is φ = 121661760.

The previous prime is 256729111. The next prime is 256729147. The reversal of 256729126 is 621927652.

256729126 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (90720) is a multiple of the sum of its prime divisors (756).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 455721 + ... + 456283.

It is an arithmetic number, because the mean of its divisors is an integer number (12684924).

Almost surely, 2^256729126 is an apocalyptic number.

256729126 is a deficient number, since it is larger than the sum of its proper divisors (149188442).

256729126 is a wasteful number, since it uses less digits than its factorization.

256729126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756.

The product of its digits is 90720, while the sum is 40.

The square root of 256729126 is about 16022.7689866639. The cubic root of 256729126 is about 635.5626698938.

The spelling of 256729126 in words is "two hundred fifty-six million, seven hundred twenty-nine thousand, one hundred twenty-six".