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256713 = 385571
BaseRepresentation
bin111110101011001001
3111001010220
4332223021
531203323
65300253
72116302
oct765311
9431126
10256713
11165966
12104689
138cb02
14697a9
15510e3
hex3eac9

256713 has 4 divisors (see below), whose sum is σ = 342288. Its totient is φ = 171140.

The previous prime is 256699. The next prime is 256721. The reversal of 256713 is 317652.

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 256713 - 212 = 252617 is a prime.

It is a D-number.

It is a Curzon number.

256713 is a lucky number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (256723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42783 + ... + 42788.

It is an arithmetic number, because the mean of its divisors is an integer number (85572).

2256713 is an apocalyptic number.

It is an amenable number.

256713 is a deficient number, since it is larger than the sum of its proper divisors (85575).

256713 is an equidigital number, since it uses as much as digits as its factorization.

256713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85574.

The product of its digits is 1260, while the sum is 24.

The square root of 256713 is about 506.6685306983. The cubic root of 256713 is about 63.5549362355.

It can be divided in two parts, 256 and 713, that added together give a palindrome (969).

The spelling of 256713 in words is "two hundred fifty-six thousand, seven hundred thirteen".

Divisors: 1 3 85571 256713