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12678130 = 2519531259
BaseRepresentation
bin110000010111…
…001111110010
3212212010010101
4300113033302
511221200010
61131423014
7212522323
oct60271762
925763111
1012678130
11717a2a3
1242b4a6a
13281b86a
14198044a
1511a673a
hexc173f2

12678130 has 32 divisors (see below), whose sum is σ = 24494400. Its totient is φ = 4709952.

The previous prime is 12678121. The next prime is 12678131. The reversal of 12678130 is 3187621.

12678130 is a nontrivial binomial coefficient, being equal to C(5036, 2).

It is not an unprimeable number, because it can be changed into a prime (12678131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9441 + ... + 10699.

It is an arithmetic number, because the mean of its divisors is an integer number (765450).

Almost surely, 212678130 is an apocalyptic number.

12678130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12678130 is the 5035-th triangular number and also the 2518-th hexagonal number.

12678130 is the 1679-th centered nonagonal number.

12678130 is a deficient number, since it is larger than the sum of its proper divisors (11816270).

12678130 is a wasteful number, since it uses less digits than its factorization.

12678130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 12678130 is about 3560.6361791118. The cubic root of 12678130 is about 233.1766544539.

The spelling of 12678130 in words is "twelve million, six hundred seventy-eight thousand, one hundred thirty".

Divisors: 1 2 5 10 19 38 53 95 106 190 265 530 1007 1259 2014 2518 5035 6295 10070 12590 23921 47842 66727 119605 133454 239210 333635 667270 1267813 2535626 6339065 12678130