Base | Representation |
---|---|
bin | 110000011101… |
… | …010100000101 |
3 | 212220101012210 |
4 | 300131110011 |
5 | 11222443411 |
6 | 1132134033 |
7 | 212654634 |
oct | 60352405 |
9 | 25811183 |
10 | 12702981 |
11 | 7196a35 |
12 | 4307319 |
13 | 2829c75 |
14 | 198951b |
15 | 11adca6 |
hex | c1d505 |
12702981 has 8 divisors (see below), whose sum is σ = 16970464. Its totient is φ = 8452080.
The previous prime is 12702979. The next prime is 12703003. The reversal of 12702981 is 18920721.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 12702981 - 21 = 12702979 is a prime.
It is a super-2 number, since 2×127029812 = 322731452572722, which contains 22 as substring.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12702941) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2230 + ... + 5511.
It is an arithmetic number, because the mean of its divisors is an integer number (2121308).
Almost surely, 212702981 is an apocalyptic number.
It is an amenable number.
12702981 is a deficient number, since it is larger than the sum of its proper divisors (4267483).
12702981 is an equidigital number, since it uses as much as digits as its factorization.
12702981 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 8291.
The product of its (nonzero) digits is 2016, while the sum is 30.
The square root of 12702981 is about 3564.1241560866. The cubic root of 12702981 is about 233.3289085329.
The spelling of 12702981 in words is "twelve million, seven hundred two thousand, nine hundred eighty-one".
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