256069 has 4 divisors (see below), whose sum is σ = 279360. Its totient is φ = 232780.

The previous prime is 256057. The next prime is 256079. The reversal of 256069 is 960652.

256069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256069 - 2¹¹ = 254021 is a prime.

It is a super-2 number, since 2×256069² = 131142665522, which contains 22 as substring.

It is a Duffinian number.

256069 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11629 + ... + 11650.

It is an arithmetic number, because the mean of its divisors is an integer number (69840).

2²⁵⁶⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

256069 is a deficient number, since it is larger than the sum of its proper divisors (23291).

256069 is a wasteful number, since it uses less digits than its factorization.

256069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23290.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 256069 is about 506.0326076450. The cubic root of 256069 is about 63.5017462888.

The spelling of 256069 in words is "two hundred fifty-six thousand, sixty-nine".