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13385 = 52677
BaseRepresentation
bin11010001001001
3200100202
43101021
5412020
6141545
754011
oct32111
920322
1013385
11a069
1278b5
136128
144c41
153e75
hex3449

13385 has 4 divisors (see below), whose sum is σ = 16068. Its totient is φ = 10704.

The previous prime is 13381. The next prime is 13397. The reversal of 13385 is 58331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1936 + 11449 = 44^2 + 107^2 .

It is a cyclic number.

It is not a de Polignac number, because 13385 - 22 = 13381 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (13381) 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, 1334 + ... + 1343.

It is an arithmetic number, because the mean of its divisors is an integer number (4017).

213385 is an apocalyptic number.

It is an amenable number.

13385 is a deficient number, since it is larger than the sum of its proper divisors (2683).

13385 is an equidigital number, since it uses as much as digits as its factorization.

13385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2682.

The product of its digits is 360, while the sum is 20.

The square root of 13385 is about 115.6935607543. The cubic root of 13385 is about 23.7432113561.

It can be divided in two parts, 13 and 385, that multiplied together give a palindrome (5005).

The spelling of 13385 in words is "thirteen thousand, three hundred eighty-five".

Divisors: 1 5 2677 13385