71885 has 8 divisors (see below), whose sum is σ = 94176. Its totient is φ = 52240.

The previous prime is 71881. The next prime is 71887. The reversal of 71885 is 58817.

It is a happy number.

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

It is not a de Polignac number, because 71885 - 2² = 71881 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71881) 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, 599 + ... + 708.

It is an arithmetic number, because the mean of its divisors is an integer number (11772).

2⁷¹⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

71885 is a deficient number, since it is larger than the sum of its proper divisors (22291).

71885 is a wasteful number, since it uses less digits than its factorization.

71885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323.

The product of its digits is 2240, while the sum is 29.

The square root of 71885 is about 268.1137818166. The cubic root of 71885 is about 41.5795156175.

It can be divided in two parts, 71 and 885, that multiplied together give a triangular number (62835 = T₃₅₄).

The spelling of 71885 in words is "seventy-one thousand, eight hundred eighty-five".