Base | Representation |
---|---|
bin | 110010101001… |
… | …000111100101 |
3 | 220222110201200 |
4 | 302221013211 |
5 | 11344304441 |
6 | 1152313113 |
7 | 220561302 |
oct | 62510745 |
9 | 26873650 |
10 | 13275621 |
11 | 7548197 |
12 | 4542799 |
13 | 299a7c8 |
14 | 1a980a9 |
15 | 12737b6 |
hex | ca91e5 |
13275621 has 12 divisors (see below), whose sum is σ = 19207500. Its totient is φ = 8835840.
The previous prime is 13275607. The next prime is 13275653. The reversal of 13275621 is 12657231.
It is a happy number.
13275621 is a `hidden beast` number, since 1 + 32 + 7 + 5 + 621 = 666.
13275621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It can be written as a sum of positive squares in 2 ways, for example, as 9235521 + 4040100 = 3039^2 + 2010^2 .
It is not a de Polignac number, because 13275621 - 29 = 13275109 is a prime.
It is a super-2 number, since 2×132756212 = 352484225871282, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (13275121) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10005 + ... + 11253.
It is an arithmetic number, because the mean of its divisors is an integer number (1600625).
Almost surely, 213275621 is an apocalyptic number.
It is an amenable number.
13275621 is a deficient number, since it is larger than the sum of its proper divisors (5931879).
13275621 is a wasteful number, since it uses less digits than its factorization.
13275621 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2436 (or 2433 counting only the distinct ones).
The product of its digits is 2520, while the sum is 27.
The square root of 13275621 is about 3643.5725600021. The cubic root of 13275621 is about 236.7835977975.
The spelling of 13275621 in words is "thirteen million, two hundred seventy-five thousand, six hundred twenty-one".
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