Base | Representation |
---|---|
bin | 110000000000… |
… | …111010100101 |
3 | 212200110122122 |
4 | 300000322211 |
5 | 11210233121 |
6 | 1125435325 |
7 | 211661543 |
oct | 60007245 |
9 | 25613578 |
10 | 12586661 |
11 | 71175aa |
12 | 426bb45 |
13 | 27b9039 |
14 | 1958d93 |
15 | 11895ab |
hex | c00ea5 |
12586661 has 2 divisors, whose sum is σ = 12586662. Its totient is φ = 12586660.
The previous prime is 12586657. The next prime is 12586711. The reversal of 12586661 is 16668521.
It is a happy number.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 11937025 + 649636 = 3455^2 + 806^2 .
It is an emirp because it is prime and its reverse (16668521) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 12586661 - 22 = 12586657 is a prime.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (12586621) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6293330 + 6293331.
It is an arithmetic number, because the mean of its divisors is an integer number (6293331).
Almost surely, 212586661 is an apocalyptic number.
It is an amenable number.
12586661 is a deficient number, since it is larger than the sum of its proper divisors (1).
12586661 is an equidigital number, since it uses as much as digits as its factorization.
12586661 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 17280, while the sum is 35.
The square root of 12586661 is about 3547.7684535494. The cubic root of 12586661 is about 232.6145333104.
The spelling of 12586661 in words is "twelve million, five hundred eighty-six thousand, six hundred sixty-one".
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