Base | Representation |
---|---|
bin | 110001011100… |
… | …110010100101 |
3 | 220101120212102 |
4 | 301130302211 |
5 | 11304303411 |
6 | 1141501445 |
7 | 215116643 |
oct | 61346245 |
9 | 26346772 |
10 | 12962981 |
11 | 7354309 |
12 | 4411885 |
13 | 28bb405 |
14 | 1a16193 |
15 | 1210d3b |
hex | c5cca5 |
12962981 has 2 divisors, whose sum is σ = 12962982. Its totient is φ = 12962980.
The previous prime is 12962951. The next prime is 12963089. The reversal of 12962981 is 18926921.
12962981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 11498881 + 1464100 = 3391^2 + 1210^2 .
It is a cyclic number.
It is not a de Polignac number, because 12962981 - 218 = 12700837 is a prime.
It is a super-2 number, since 2×129629812 = 336077752812722, which contains 22 as substring.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (12962941) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6481490 + 6481491.
It is an arithmetic number, because the mean of its divisors is an integer number (6481491).
Almost surely, 212962981 is an apocalyptic number.
It is an amenable number.
12962981 is a deficient number, since it is larger than the sum of its proper divisors (1).
12962981 is an equidigital number, since it uses as much as digits as its factorization.
12962981 is an evil number, because the sum of its binary digits is even.
The product of its digits is 15552, while the sum is 38.
The square root of 12962981 is about 3600.4140039723. The cubic root of 12962981 is about 234.9100666889.
The spelling of 12962981 in words is "twelve million, nine hundred sixty-two thousand, nine hundred eighty-one".
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