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12385 = 52477
BaseRepresentation
bin11000001100001
3121222201
43001201
5344020
6133201
751052
oct30141
917881
1012385
11933a
127201
135839
144729
153a0a
hex3061

12385 has 4 divisors (see below), whose sum is σ = 14868. Its totient is φ = 9904.

The previous prime is 12379. The next prime is 12391. The reversal of 12385 is 58321.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (12379) and next prime (12391).

It can be written as a sum of positive squares in 2 ways, for example, as 5329 + 7056 = 73^2 + 84^2 .

It is a cyclic number.

It is not a de Polignac number, because 12385 - 23 = 12377 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1234 + ... + 1243.

It is an arithmetic number, because the mean of its divisors is an integer number (3717).

212385 is an apocalyptic number.

It is an amenable number.

12385 is a deficient number, since it is larger than the sum of its proper divisors (2483).

12385 is an equidigital number, since it uses as much as digits as its factorization.

12385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2482.

The product of its digits is 240, while the sum is 19.

The square root of 12385 is about 111.2879148875. The cubic root of 12385 is about 23.1365537590.

The spelling of 12385 in words is "twelve thousand, three hundred eighty-five".

Divisors: 1 5 2477 12385