Base | Representation |
---|---|
bin | 110000011010… |
… | …000111100111 |
3 | 212212201021010 |
4 | 300122013213 |
5 | 11222034040 |
6 | 1131553303 |
7 | 212601531 |
oct | 60320747 |
9 | 25781233 |
10 | 12689895 |
11 | 7188119 |
12 | 42bb833 |
13 | 282401a |
14 | 1984851 |
15 | 11a9e80 |
hex | c1a1e7 |
12689895 has 16 divisors (see below), whose sum is σ = 20356992. Its totient is φ = 6750240.
The previous prime is 12689893. The next prime is 12689923. The reversal of 12689895 is 59898621.
It is a happy number.
12689895 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.
It is not a de Polignac number, because 12689895 - 21 = 12689893 is a prime.
It is a super-2 number, since 2×126898952 = 322066870222050, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12689893) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6504 + ... + 8226.
It is an arithmetic number, because the mean of its divisors is an integer number (1272312).
Almost surely, 212689895 is an apocalyptic number.
12689895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.
12689895 is a deficient number, since it is larger than the sum of its proper divisors (7667097).
12689895 is a wasteful number, since it uses less digits than its factorization.
12689895 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2222.
The product of its digits is 311040, while the sum is 48.
The square root of 12689895 is about 3562.2878884223. The cubic root of 12689895 is about 233.2487595986.
The spelling of 12689895 in words is "twelve million, six hundred eighty-nine thousand, eight hundred ninety-five".
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