256112421 has 8 divisors (see below), whose sum is σ = 352498944. Its totient is φ = 165233760.

The previous prime is 256112347. The next prime is 256112471. The reversal of 256112421 is 124211652.

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

It is not a de Polignac number, because 256112421 - 2⁹ = 256111909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256112391 and 256112400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256112471) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1376856 + ... + 1377041.

It is an arithmetic number, because the mean of its divisors is an integer number (44062368).

Almost surely, 2^256112421 is an apocalyptic number.

It is an amenable number.

256112421 is a deficient number, since it is larger than the sum of its proper divisors (96386523).

256112421 is a wasteful number, since it uses less digits than its factorization.

256112421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2753931.

The product of its digits is 960, while the sum is 24.

The square root of 256112421 is about 16003.5127706388. The cubic root of 256112421 is about 635.0533536504.

The spelling of 256112421 in words is "two hundred fifty-six million, one hundred twelve thousand, four hundred twenty-one".