Base | Representation |
---|---|
bin | 110001100111… |
… | …000011010111 |
3 | 220110201112020 |
4 | 301213003113 |
5 | 11312130030 |
6 | 1142424223 |
7 | 215353332 |
oct | 61470327 |
9 | 26421466 |
10 | 13005015 |
11 | 7382951 |
12 | 4432073 |
13 | 290459a |
14 | 1a27619 |
15 | 121d510 |
hex | c670d7 |
13005015 has 8 divisors (see below), whose sum is σ = 20808048. Its totient is φ = 6936000.
The previous prime is 13005011. The next prime is 13005029. The reversal of 13005015 is 51050031.
13005015 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 13005015 - 22 = 13005011 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 867001 = 13005015 / (1 + 3 + 0 + 0 + 5 + 0 + 1 + 5).
It is a junction number, because it is equal to n+sod(n) for n = 13004985 and 13005003.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (13005011) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433486 + ... + 433515.
It is an arithmetic number, because the mean of its divisors is an integer number (2601006).
Almost surely, 213005015 is an apocalyptic number.
13005015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.
13005015 is a deficient number, since it is larger than the sum of its proper divisors (7803033).
13005015 is an equidigital number, since it uses as much as digits as its factorization.
13005015 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 867009.
The product of its (nonzero) digits is 75, while the sum is 15.
The square root of 13005015 is about 3606.2466637766. The cubic root of 13005015 is about 235.1637006374.
Adding to 13005015 its reverse (51050031), we get a palindrome (64055046).
The spelling of 13005015 in words is "thirteen million, five thousand, fifteen".
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