Base | Representation |
---|---|
bin | 101110010001… |
… | …101010011100 |
3 | 211211022120021 |
4 | 232101222130 |
5 | 11101142342 |
6 | 1112001524 |
7 | 205053160 |
oct | 56215234 |
9 | 24738507 |
10 | 12130972 |
11 | 69361a7 |
12 | 40902a4 |
13 | 26897b9 |
14 | 187aca0 |
15 | 10e9567 |
hex | b91a9c |
12130972 has 12 divisors (see below), whose sum is σ = 24262000. Its totient is φ = 5198976.
The previous prime is 12130907. The next prime is 12130973. The reversal of 12130972 is 27903121.
12130972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
12130972 is an admirable number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12130973) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216597 + ... + 216652.
Almost surely, 212130972 is an apocalyptic number.
It is an amenable number.
12130972 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12130972 is a wasteful number, since it uses less digits than its factorization.
12130972 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 433260 (or 433258 counting only the distinct ones).
The product of its (nonzero) digits is 756, while the sum is 25.
The square root of 12130972 is about 3482.9544929557. The cubic root of 12130972 is about 229.7727560192.
The spelling of 12130972 in words is "twelve million, one hundred thirty thousand, nine hundred seventy-two".
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