256274105 has 4 divisors (see below), whose sum is σ = 307528932. Its totient is φ = 205019280.

The previous prime is 256274093. The next prime is 256274107. The reversal of 256274105 is 501472652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37589161 + 218684944 = 6131^2 + 14788^2 .

It is not a de Polignac number, because 256274105 - 2²⁶ = 189165241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256274107) 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 3 ways as a sum of consecutive naturals, for example, 25627406 + ... + 25627415.

It is an arithmetic number, because the mean of its divisors is an integer number (76882233).

Almost surely, 2^256274105 is an apocalyptic number.

It is an amenable number.

256274105 is a deficient number, since it is larger than the sum of its proper divisors (51254827).

256274105 is an equidigital number, since it uses as much as digits as its factorization.

256274105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51254826.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 256274105 is about 16008.5634895827. The cubic root of 256274105 is about 635.1869621216.

It can be divided in two parts, 2562 and 74105, that added together give a palindrome (76667).

The spelling of 256274105 in words is "two hundred fifty-six million, two hundred seventy-four thousand, one hundred five".