256041705 has 32 divisors (see below), whose sum is σ = 417973248. Its totient is φ = 133804800.

The previous prime is 256041683. The next prime is 256041787. The reversal of 256041705 is 507140652.

It is not a de Polignac number, because 256041705 - 2⁵ = 256041673 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 421512 + ... + 422118.

It is an arithmetic number, because the mean of its divisors is an integer number (13061664).

Almost surely, 2^256041705 is an apocalyptic number.

It is an amenable number.

256041705 is a deficient number, since it is larger than the sum of its proper divisors (161931543).

256041705 is a wasteful number, since it uses less digits than its factorization.

256041705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 256041705 is about 16001.3032281749. The cubic root of 256041705 is about 634.9948994155.

The spelling of 256041705 in words is "two hundred fifty-six million, forty-one thousand, seven hundred five".