256112005 has 8 divisors (see below), whose sum is σ = 308880000. Its totient is φ = 203859216.

The previous prime is 256111993. The next prime is 256112009. The reversal of 256112005 is 500211652.

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

It is a cyclic number.

It is not a de Polignac number, because 256112005 - 2¹⁵ = 256079237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256112009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127705 + ... + 129694.

It is an arithmetic number, because the mean of its divisors is an integer number (38610000).

Almost surely, 2^256112005 is an apocalyptic number.

It is an amenable number.

256112005 is a deficient number, since it is larger than the sum of its proper divisors (52767995).

256112005 is a wasteful number, since it uses less digits than its factorization.

256112005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257603.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 256112005 is about 16003.4997734870. The cubic root of 256112005 is about 635.0530098140.

Adding to 256112005 its reverse (500211652), we get a palindrome (756323657).

The spelling of 256112005 in words is "two hundred fifty-six million, one hundred twelve thousand, five".