256126765 has 16 divisors (see below), whose sum is σ = 317444400. Its totient is φ = 198236160.

The previous prime is 256126763. The next prime is 256126771. The reversal of 256126765 is 567621652.

It can be written as a sum of positive squares in 8 ways, for example, as 52722121 + 203404644 = 7261^2 + 14262^2 .

It is not a de Polignac number, because 256126765 - 2¹ = 256126763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256126763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29661 + ... + 37309.

It is an arithmetic number, because the mean of its divisors is an integer number (19840275).

Almost surely, 2^256126765 is an apocalyptic number.

It is an amenable number.

256126765 is a deficient number, since it is larger than the sum of its proper divisors (61317635).

256126765 is a wasteful number, since it uses less digits than its factorization.

256126765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7872.

The product of its digits is 151200, while the sum is 40.

The square root of 256126765 is about 16003.9609159733. The cubic root of 256126765 is about 635.0652091671.

The spelling of 256126765 in words is "two hundred fifty-six million, one hundred twenty-six thousand, seven hundred sixty-five".