256336741 has 2 divisors, whose sum is σ = 256336742. Its totient is φ = 256336740.

The previous prime is 256336723. The next prime is 256336757. The reversal of 256336741 is 147633652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256320100 + 16641 = 16010^2 + 129^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256336741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256336741.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256336441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128168370 + 128168371.

It is an arithmetic number, because the mean of its divisors is an integer number (128168371).

Almost surely, 2^256336741 is an apocalyptic number.

It is an amenable number.

256336741 is a deficient number, since it is larger than the sum of its proper divisors (1).

256336741 is an equidigital number, since it uses as much as digits as its factorization.

256336741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 37.

The square root of 256336741 is about 16010.5196979986. The cubic root of 256336741 is about 635.2387066261.

It can be divided in two parts, 2563 and 36741, that added together give a cube (39304 = 34³).

The spelling of 256336741 in words is "two hundred fifty-six million, three hundred thirty-six thousand, seven hundred forty-one".