256011061 has 4 divisors (see below), whose sum is σ = 256280652. Its totient is φ = 255741472.

The previous prime is 256011053. The next prime is 256011071. The reversal of 256011061 is 160110652.

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 134328100 + 121682961 = 11590^2 + 11031^2 .

It is a cyclic number.

It is not a de Polignac number, because 256011061 - 2³ = 256011053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256011001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133366 + ... + 135271.

It is an arithmetic number, because the mean of its divisors is an integer number (64070163).

Almost surely, 2^256011061 is an apocalyptic number.

It is an amenable number.

256011061 is a deficient number, since it is larger than the sum of its proper divisors (269591).

256011061 is an equidigital number, since it uses as much as digits as its factorization.

256011061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269590.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 256011061 is about 16000.3456525164. The cubic root of 256011061 is about 634.9695655738.

It can be divided in two parts, 25601 and 1061, that added together give a palindrome (26662).

The spelling of 256011061 in words is "two hundred fifty-six million, eleven thousand, sixty-one".