256578141 has 16 divisors (see below), whose sum is σ = 349588224. Its totient is φ = 167329344.

The previous prime is 256578089. The next prime is 256578181. The reversal of 256578141 is 141875652.

It is not a de Polignac number, because 256578141 - 2²² = 252383837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256578141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256578181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56155 + ... + 60551.

It is an arithmetic number, because the mean of its divisors is an integer number (21849264).

Almost surely, 2^256578141 is an apocalyptic number.

It is an amenable number.

256578141 is a deficient number, since it is larger than the sum of its proper divisors (93010083).

256578141 is a wasteful number, since it uses less digits than its factorization.

256578141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4820.

The product of its digits is 67200, while the sum is 39.

The square root of 256578141 is about 16018.0567173425. The cubic root of 256578141 is about 635.4380518458.

The spelling of 256578141 in words is "two hundred fifty-six million, five hundred seventy-eight thousand, one hundred forty-one".