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71045 = 5131093
BaseRepresentation
bin10001010110000101
310121110022
4101112011
54233140
61304525
7414062
oct212605
9117408
1071045
1149417
1235145
1326450
141bc69
15160b5
hex11585

71045 has 8 divisors (see below), whose sum is σ = 91896. Its totient is φ = 52416.

The previous prime is 71039. The next prime is 71059. The reversal of 71045 is 54017.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13924 + 57121 = 118^2 + 239^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71045 - 26 = 70981 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 482 + ... + 611.

It is an arithmetic number, because the mean of its divisors is an integer number (11487).

271045 is an apocalyptic number.

It is an amenable number.

71045 is a deficient number, since it is larger than the sum of its proper divisors (20851).

71045 is a wasteful number, since it uses less digits than its factorization.

71045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 71045 is about 266.5426795093. The cubic root of 71045 is about 41.4169238532.

The spelling of 71045 in words is "seventy-one thousand, forty-five".

Divisors: 1 5 13 65 1093 5465 14209 71045