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12878 = 247137
BaseRepresentation
bin11001001001110
3122122222
43021032
5403003
6135342
752355
oct31116
918588
1012878
119748
127552
135b28
14499c
153c38
hex324e

12878 has 8 divisors (see below), whose sum is σ = 19872. Its totient is φ = 6256.

The previous prime is 12853. The next prime is 12889. The reversal of 12878 is 87821.

12878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an Ulam number.

It is a plaindrome in base 14.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

12878 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 26 + ... + 162.

It is an arithmetic number, because the mean of its divisors is an integer number (2484).

212878 is an apocalyptic number.

12878 is a deficient number, since it is larger than the sum of its proper divisors (6994).

12878 is a wasteful number, since it uses less digits than its factorization.

12878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186.

The product of its digits is 896, while the sum is 26.

The square root of 12878 is about 113.4812759886. The cubic root of 12878 is about 23.4395610039.

It can be divided in two parts, 1287 and 8, that multiplied together give a triangular number (10296 = T143).

The spelling of 12878 in words is "twelve thousand, eight hundred seventy-eight".

Divisors: 1 2 47 94 137 274 6439 12878