71771 has 4 divisors (see below), whose sum is σ = 82032. Its totient is φ = 61512.

The previous prime is 71761. The next prime is 71777. The reversal of 71771 is 17717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17717 = 7 ⋅2531.

It is a cyclic number.

It is not a de Polignac number, because 71771 - 2⁶ = 71707 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (71777) 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, 5120 + ... + 5133.

It is an arithmetic number, because the mean of its divisors is an integer number (20508).

2⁷¹⁷⁷¹ is an apocalyptic number.

71771 is a deficient number, since it is larger than the sum of its proper divisors (10261).

71771 is a wasteful number, since it uses less digits than its factorization.

71771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10260.

The product of its digits is 343, while the sum is 23.

The square root of 71771 is about 267.9011011549. The cubic root of 71771 is about 41.5575241372.

The spelling of 71771 in words is "seventy-one thousand, seven hundred seventy-one", and thus it is an iban number.