256875158 has 4 divisors (see below), whose sum is σ = 385312740. Its totient is φ = 128437578.

The previous prime is 256875139. The next prime is 256875167. The reversal of 256875158 is 851578652.

It is a happy number.

256875158 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64218788 + ... + 64218791.

It is an arithmetic number, because the mean of its divisors is an integer number (96328185).

Almost surely, 2^256875158 is an apocalyptic number.

256875158 is a deficient number, since it is larger than the sum of its proper divisors (128437582).

256875158 is a wasteful number, since it uses less digits than its factorization.

256875158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128437581.

The product of its digits is 672000, while the sum is 47.

The square root of 256875158 is about 16027.3253539073. The cubic root of 256875158 is about 635.6831534258.

The spelling of 256875158 in words is "two hundred fifty-six million, eight hundred seventy-five thousand, one hundred fifty-eight".