256275605 has 16 divisors (see below), whose sum is σ = 321484800. Its totient is φ = 195886080.

The previous prime is 256275601. The next prime is 256275611. The reversal of 256275605 is 506572652.

It is not a de Polignac number, because 256275605 - 2² = 256275601 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256275601) 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, 1781 + ... + 22709.

It is an arithmetic number, because the mean of its divisors is an integer number (20092800).

Almost surely, 2^256275605 is an apocalyptic number.

It is an amenable number.

256275605 is a deficient number, since it is larger than the sum of its proper divisors (65209195).

256275605 is a wasteful number, since it uses less digits than its factorization.

256275605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21044.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 256275605 is about 16008.6103394392. The cubic root of 256275605 is about 635.1882013918.

The spelling of 256275605 in words is "two hundred fifty-six million, two hundred seventy-five thousand, six hundred five".