256871435 has 4 divisors (see below), whose sum is σ = 308245728. Its totient is φ = 205497144.

The previous prime is 256871413. The next prime is 256871467. The reversal of 256871435 is 534178652.

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

It is a cyclic number.

It is not a de Polignac number, because 256871435 - 2¹² = 256867339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256871392 and 256871401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25687139 + ... + 25687148.

It is an arithmetic number, because the mean of its divisors is an integer number (77061432).

Almost surely, 2^256871435 is an apocalyptic number.

256871435 is a deficient number, since it is larger than the sum of its proper divisors (51374293).

256871435 is an equidigital number, since it uses as much as digits as its factorization.

256871435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51374292.

The product of its digits is 201600, while the sum is 41.

The square root of 256871435 is about 16027.2092080936. The cubic root of 256871435 is about 635.6800823363.

The spelling of 256871435 in words is "two hundred fifty-six million, eight hundred seventy-one thousand, four hundred thirty-five".