256484461 has 2 divisors, whose sum is σ = 256484462. Its totient is φ = 256484460.

The previous prime is 256484441. The next prime is 256484467. The reversal of 256484461 is 164484652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193043236 + 63441225 = 13894^2 + 7965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256484461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256484467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128242230 + 128242231.

It is an arithmetic number, because the mean of its divisors is an integer number (128242231).

Almost surely, 2^256484461 is an apocalyptic number.

It is an amenable number.

256484461 is a deficient number, since it is larger than the sum of its proper divisors (1).

256484461 is an equidigital number, since it uses as much as digits as its factorization.

256484461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 184320, while the sum is 40.

The square root of 256484461 is about 16015.1322504686. The cubic root of 256484461 is about 635.3607068796.

It can be divided in two parts, 2564 and 84461, that added together give a square (87025 = 295²).

The spelling of 256484461 in words is "two hundred fifty-six million, four hundred eighty-four thousand, four hundred sixty-one".