45071 has 4 divisors (see below), whose sum is σ = 48552. Its totient is φ = 41592.

The previous prime is 45061. The next prime is 45077. The reversal of 45071 is 17054.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17054 = 2 ⋅8527.

It is a cyclic number.

It is not a de Polignac number, because 45071 - 2⁶ = 45007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45077) 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, 1721 + ... + 1746.

It is an arithmetic number, because the mean of its divisors is an integer number (12138).

2⁴⁵⁰⁷¹ is an apocalyptic number.

45071 is a deficient number, since it is larger than the sum of its proper divisors (3481).

45071 is a wasteful number, since it uses less digits than its factorization.

45071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3480.

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

The square root of 45071 is about 212.2993170031. The cubic root of 45071 is about 35.5876298393.

Subtracting from 45071 its sum of digits (17), we obtain a palindrome (45054).

The spelling of 45071 in words is "forty-five thousand, seventy-one".