256682105 has 8 divisors (see below), whose sum is σ = 308789064. Its totient is φ = 204832000.

The previous prime is 256682081. The next prime is 256682117. The reversal of 256682105 is 501286652.

It can be written as a sum of positive squares in 4 ways, for example, as 41267776 + 215414329 = 6424^2 + 14677^2 .

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

It is not a de Polignac number, because 256682105 - 2²⁰ = 255633529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62006 + ... + 66015.

It is an arithmetic number, because the mean of its divisors is an integer number (38598633).

Almost surely, 2^256682105 is an apocalyptic number.

It is an amenable number.

256682105 is a deficient number, since it is larger than the sum of its proper divisors (52106959).

256682105 is a wasteful number, since it uses less digits than its factorization.

256682105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128427.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 256682105 is about 16021.3016013057. The cubic root of 256682105 is about 635.5238655485.

The spelling of 256682105 in words is "two hundred fifty-six million, six hundred eighty-two thousand, one hundred five".