40071 has 12 divisors (see below), whose sum is σ = 57912. Its totient is φ = 24624.

The previous prime is 40063. The next prime is 40087. The reversal of 40071 is 17004.

40071 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40071 - 2³ = 40063 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1065 + ... + 1101.

It is an arithmetic number, because the mean of its divisors is an integer number (4826).

2⁴⁰⁰⁷¹ is an apocalyptic number.

40071 is a deficient number, since it is larger than the sum of its proper divisors (17841).

40071 is a wasteful number, since it uses less digits than its factorization.

40071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 40071 is about 200.1774213042. The cubic root of 40071 is about 34.2197416885.

Adding to 40071 its reverse (17004), we get a palindrome (57075).

The spelling of 40071 in words is "forty thousand, seventy-one", and thus it is an iban number.