Base | Representation |
---|---|
bin | 110000111100… |
… | …100100110001 |
3 | 220010212212011 |
4 | 300330210301 |
5 | 11241043100 |
6 | 1135002521 |
7 | 214030144 |
oct | 60744461 |
9 | 26125764 |
10 | 12831025 |
11 | 7274159 |
12 | 4369441 |
13 | 287332c |
14 | 19c005b |
15 | 11d6bba |
hex | c3c931 |
12831025 has 12 divisors (see below), whose sum is σ = 16182000. Its totient is φ = 10089680.
The previous prime is 12831001. The next prime is 12831029. The reversal of 12831025 is 52013821.
It is not a de Polignac number, because 12831025 - 29 = 12830513 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 12830987 and 12831005.
It is not an unprimeable number, because it can be changed into a prime (12831029) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2875 + ... + 5824.
It is an arithmetic number, because the mean of its divisors is an integer number (1348500).
Almost surely, 212831025 is an apocalyptic number.
It is an amenable number.
12831025 is a deficient number, since it is larger than the sum of its proper divisors (3350975).
12831025 is an equidigital number, since it uses as much as digits as its factorization.
12831025 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 8768 (or 8763 counting only the distinct ones).
The product of its (nonzero) digits is 480, while the sum is 22.
The square root of 12831025 is about 3582.0420153873. The cubic root of 12831025 is about 234.1102616699.
Adding to 12831025 its reverse (52013821), we get a palindrome (64844846).
The spelling of 12831025 in words is "twelve million, eight hundred thirty-one thousand, twenty-five".
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