256249241 has 2 divisors, whose sum is σ = 256249242. Its totient is φ = 256249240.

The previous prime is 256249207. The next prime is 256249243. The reversal of 256249241 is 142942652.

256249241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237283216 + 18966025 = 15404^2 + 4355^2 .

It is a cyclic number.

It is not a de Polignac number, because 256249241 - 2¹⁰ = 256248217 is a prime.

Together with 256249243, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256249243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128124620 + 128124621.

It is an arithmetic number, because the mean of its divisors is an integer number (128124621).

Almost surely, 2^256249241 is an apocalyptic number.

It is an amenable number.

256249241 is a deficient number, since it is larger than the sum of its proper divisors (1).

256249241 is an equidigital number, since it uses as much as digits as its factorization.

256249241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 35.

The square root of 256249241 is about 16007.7868863875. The cubic root of 256249241 is about 635.1664192744.

The spelling of 256249241 in words is "two hundred fifty-six million, two hundred forty-nine thousand, two hundred forty-one".