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12678 = 232113
BaseRepresentation
bin11000110000110
3122101120
43012012
5401203
6134410
751651
oct30606
918346
1012678
119586
127406
135a03
144898
153b53
hex3186

12678 has 8 divisors (see below), whose sum is σ = 25368. Its totient is φ = 4224.

The previous prime is 12671. The next prime is 12689. The reversal of 12678 is 87621.

It can be divided in two parts, 1267 and 8, that added together give a triangular number (1275 = T50).

It is a sphenic number, since it is the product of 3 distinct primes.

12678 is an admirable number.

It is a Curzon number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12671) 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, 1051 + ... + 1062.

It is an arithmetic number, because the mean of its divisors is an integer number (3171).

212678 is an apocalyptic number.

12678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12684).

12678 is a wasteful number, since it uses less digits than its factorization.

12678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118.

The product of its digits is 672, while the sum is 24.

The square root of 12678 is about 112.5966251714. The cubic root of 12678 is about 23.3175857463.

The spelling of 12678 in words is "twelve thousand, six hundred seventy-eight".

Divisors: 1 2 3 6 2113 4226 6339 12678