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12115 = 52423
BaseRepresentation
bin10111101010011
3121121201
42331103
5341430
6132031
750215
oct27523
917551
1012115
119114
127017
13568c
1445b5
1538ca
hex2f53

12115 has 4 divisors (see below), whose sum is σ = 14544. Its totient is φ = 9688.

The previous prime is 12113. The next prime is 12119. The reversal of 12115 is 51121.

Adding to 12115 its reverse (51121), we get a palindrome (63236).

It can be divided in two parts, 121 and 15, that added together give a triangular number (136 = T16).

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12115 - 21 = 12113 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (12113) 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, 1207 + ... + 1216.

It is an arithmetic number, because the mean of its divisors is an integer number (3636).

212115 is an apocalyptic number.

12115 is a deficient number, since it is larger than the sum of its proper divisors (2429).

12115 is an equidigital number, since it uses as much as digits as its factorization.

12115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428.

The product of its digits is 10, while the sum is 10.

The square root of 12115 is about 110.0681607005. The cubic root of 12115 is about 22.9671869839.

The spelling of 12115 in words is "twelve thousand, one hundred fifteen".

Divisors: 1 5 2423 12115