1256928086 has 16 divisors (see below), whose sum is σ = 1894824144. Its totient is φ = 625327104.

The previous prime is 1256928083. The next prime is 1256928149. The reversal of 1256928086 is 6808296521.

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 1256928086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256928083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551846 + ... + 554118.

It is an arithmetic number, because the mean of its divisors is an integer number (118426509).

Almost surely, 2^1256928086 is an apocalyptic number.

1256928086 is a deficient number, since it is larger than the sum of its proper divisors (637896058).

1256928086 is a wasteful number, since it uses less digits than its factorization.

1256928086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3535.

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 1256928086 is about 35453.1816061690. The cubic root of 1256928086 is about 1079.2038273600.

The spelling of 1256928086 in words is "one billion, two hundred fifty-six million, nine hundred twenty-eight thousand, eighty-six".