5671 has 4 divisors (see below), whose sum is σ = 5832. Its totient is φ = 5512.

The previous prime is 5669. The next prime is 5683. The reversal of 5671 is 1765.

5671 is a nontrivial binomial coefficient, being equal to C(107, 2).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1765 = 5 ⋅353.

It is not a de Polignac number, because 5671 - 2¹ = 5669 is a prime.

It is a Duffinian number.

5671 is a lucky number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5641) by changing a digit.

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, 1 + ... + 106.

It is an arithmetic number, because the mean of its divisors is an integer number (1458).

2⁵⁶⁷¹ is an apocalyptic number.

5671 is the 106-th triangular number.

5671 is the 36-th centered nonagonal number.

5671 is a deficient number, since it is larger than the sum of its proper divisors (161).

5671 is a wasteful number, since it uses less digits than its factorization.

5671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160.

The product of its digits is 210, while the sum is 19.

The square root of 5671 is about 75.3060422543. The cubic root of 5671 is about 17.8328141074.

It can be divided in two parts, 5 and 671, that added together give a palindrome (676).

The spelling of 5671 in words is "five thousand, six hundred seventy-one".