256017 has 8 divisors (see below), whose sum is σ = 347200. Its totient is φ = 167760.

The previous prime is 255989. The next prime is 256019. The reversal of 256017 is 710652.

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

It is not a de Polignac number, because 256017 - 2¹⁰ = 254993 is a prime.

It is a Duffinian number.

256017 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 255984 and 256002.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256017.

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 7 ways as a sum of consecutive naturals, for example, 517 + ... + 882.

It is an arithmetic number, because the mean of its divisors is an integer number (43400).

2²⁵⁶⁰¹⁷ is an apocalyptic number.

It is an amenable number.

256017 is a deficient number, since it is larger than the sum of its proper divisors (91183).

256017 is a wasteful number, since it uses less digits than its factorization.

256017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 256017 is about 505.9812249481. The cubic root of 256017 is about 63.4974475590.

Adding to 256017 its reverse (710652), we get a palindrome (966669).

The spelling of 256017 in words is "two hundred fifty-six thousand, seventeen".