256455049 has 2 divisors, whose sum is σ = 256455050. Its totient is φ = 256455048.

The previous prime is 256455011. The next prime is 256455061. The reversal of 256455049 is 940554652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238239225 + 18215824 = 15435^2 + 4268^2 .

It is a cyclic number.

It is not a de Polignac number, because 256455049 - 2⁷ = 256454921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256455079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128227524 + 128227525.

It is an arithmetic number, because the mean of its divisors is an integer number (128227525).

Almost surely, 2^256455049 is an apocalyptic number.

It is an amenable number.

256455049 is a deficient number, since it is larger than the sum of its proper divisors (1).

256455049 is an equidigital number, since it uses as much as digits as its factorization.

256455049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 40.

The square root of 256455049 is about 16014.2139675977. The cubic root of 256455049 is about 635.3364195818.

The spelling of 256455049 in words is "two hundred fifty-six million, four hundred fifty-five thousand, forty-nine".