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12506 = 213237
BaseRepresentation
bin11000011011010
3122011012
43003122
5400011
6133522
751314
oct30332
918135
1012506
11943a
1272a2
135900
1447b4
153a8b
hex30da

12506 has 12 divisors (see below), whose sum is σ = 20862. Its totient is φ = 5616.

The previous prime is 12503. The next prime is 12511. The reversal of 12506 is 60521.

12506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 9025 + 3481 = 95^2 + 59^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 320 + ... + 356.

212506 is an apocalyptic number.

12506 is a deficient number, since it is larger than the sum of its proper divisors (8356).

12506 is a wasteful number, since it uses less digits than its factorization.

12506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 12506 is about 111.8302284716. The cubic root of 12506 is about 23.2116568452.

The spelling of 12506 in words is "twelve thousand, five hundred six".

Divisors: 1 2 13 26 37 74 169 338 481 962 6253 12506