Base | Representation |
---|---|
bin | 110001100101… |
… | …110101101101 |
3 | 220110110201011 |
4 | 301211311231 |
5 | 11312000140 |
6 | 1142345221 |
7 | 215333002 |
oct | 61456555 |
9 | 26413634 |
10 | 13000045 |
11 | 737a143 |
12 | 442b211 |
13 | 2902246 |
14 | 1a258a9 |
15 | 121bcea |
hex | c65d6d |
13000045 has 8 divisors (see below), whose sum is σ = 15626520. Its totient is φ = 10382400.
The previous prime is 13000027. The next prime is 13000049. The reversal of 13000045 is 54000031.
It can be written as a sum of positive squares in 4 ways, for example, as 1990921 + 11009124 = 1411^2 + 3318^2 .
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 13000045 - 29 = 12999533 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 12999989 and 13000034.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (13000049) 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, 1651 + ... + 5359.
It is an arithmetic number, because the mean of its divisors is an integer number (1953315).
Almost surely, 213000045 is an apocalyptic number.
It is an amenable number.
13000045 is a deficient number, since it is larger than the sum of its proper divisors (2626475).
13000045 is an equidigital number, since it uses as much as digits as its factorization.
13000045 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4415.
The product of its (nonzero) digits is 60, while the sum is 13.
The square root of 13000045 is about 3605.5575158358. The cubic root of 13000045 is about 235.1337400796.
Adding to 13000045 its reverse (54000031), we get a palindrome (67000076).
The spelling of 13000045 in words is "thirteen million, forty-five", and thus it is an aban number and an uban number.
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