256447059 has 16 divisors (see below), whose sum is σ = 376320384. Its totient is φ = 154044800.

The previous prime is 256447049. The next prime is 256447067. The reversal of 256447059 is 950744652.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256447059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256447059.

It is not an unprimeable number, because it can be changed into a prime (256447039) 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 in 15 ways as a sum of consecutive naturals, for example, 30657 + ... + 38114.

It is an arithmetic number, because the mean of its divisors is an integer number (23520024).

Almost surely, 2^256447059 is an apocalyptic number.

256447059 is a deficient number, since it is larger than the sum of its proper divisors (119873325).

256447059 is a wasteful number, since it uses less digits than its factorization.

256447059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68898.

The product of its (nonzero) digits is 302400, while the sum is 42.

The square root of 256447059 is about 16013.9644997733. The cubic root of 256447059 is about 635.3298214265.

The spelling of 256447059 in words is "two hundred fifty-six million, four hundred forty-seven thousand, fifty-nine".