Base | Representation |
---|---|
bin | 110000010111… |
… | …001111110010 |
3 | 212212010010101 |
4 | 300113033302 |
5 | 11221200010 |
6 | 1131423014 |
7 | 212522323 |
oct | 60271762 |
9 | 25763111 |
10 | 12678130 |
11 | 717a2a3 |
12 | 42b4a6a |
13 | 281b86a |
14 | 198044a |
15 | 11a673a |
hex | c173f2 |
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".
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