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71105 = 514221
BaseRepresentation
bin10001010111000001
310121112112
4101113001
54233410
61305105
7414206
oct212701
9117475
1071105
1149471
1235195
1326498
1516105
hex115c1

71105 has 4 divisors (see below), whose sum is σ = 85332. Its totient is φ = 56880.

The previous prime is 71089. The next prime is 71119. The reversal of 71105 is 50117.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50117 = 232179.

It can be written as a sum of positive squares in 2 ways, for example, as 37249 + 33856 = 193^2 + 184^2 .

It is not a de Polignac number, because 71105 - 24 = 71089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 71105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7106 + ... + 7115.

It is an arithmetic number, because the mean of its divisors is an integer number (21333).

271105 is an apocalyptic number.

It is an amenable number.

71105 is a deficient number, since it is larger than the sum of its proper divisors (14227).

71105 is a wasteful number, since it uses less digits than its factorization.

71105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14226.

The product of its (nonzero) digits is 35, while the sum is 14.

The square root of 71105 is about 266.6552080871. The cubic root of 71105 is about 41.4285799219.

The spelling of 71105 in words is "seventy-one thousand, one hundred five".

Divisors: 1 5 14221 71105