256750071 has 8 divisors (see below), whose sum is σ = 342417264. Its totient is φ = 171124800.

The previous prime is 256750069. The next prime is 256750103. The reversal of 256750071 is 170057652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256750071 - 2¹ = 256750069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256750001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8971 + ... + 24371.

It is an arithmetic number, because the mean of its divisors is an integer number (42802158).

Almost surely, 2^256750071 is an apocalyptic number.

256750071 is a deficient number, since it is larger than the sum of its proper divisors (85667193).

256750071 is a wasteful number, since it uses less digits than its factorization.

256750071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20961.

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 256750071 is about 16023.4225744689. The cubic root of 256750071 is about 635.5799533478.

The spelling of 256750071 in words is "two hundred fifty-six million, seven hundred fifty thousand, seventy-one".