Base | Representation |
---|---|
bin | 110010101010… |
… | …011011101111 |
3 | 220222202010011 |
4 | 302222123233 |
5 | 11344443012 |
6 | 1152354051 |
7 | 220613065 |
oct | 62523357 |
9 | 26882104 |
10 | 13281007 |
11 | 7551243 |
12 | 4545927 |
13 | 29a00ac |
14 | 1a9a035 |
15 | 12751a7 |
hex | caa6ef |
13281007 has 4 divisors (see below), whose sum is σ = 13604976. Its totient is φ = 12957040.
The previous prime is 13281001. The next prime is 13281017. The reversal of 13281007 is 70018231.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70018231 = 1153 ⋅60727.
It is a cyclic number.
It is not a de Polignac number, because 13281007 - 215 = 13248239 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (13281001) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161923 + ... + 162004.
It is an arithmetic number, because the mean of its divisors is an integer number (3401244).
Almost surely, 213281007 is an apocalyptic number.
13281007 is a deficient number, since it is larger than the sum of its proper divisors (323969).
13281007 is an equidigital number, since it uses as much as digits as its factorization.
13281007 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 323968.
The product of its (nonzero) digits is 336, while the sum is 22.
The square root of 13281007 is about 3644.3115948009. The cubic root of 13281007 is about 236.8156149822.
Adding to 13281007 its reverse (70018231), we get a palindrome (83299238).
The spelling of 13281007 in words is "thirteen million, two hundred eighty-one thousand, seven".
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