45173 has 4 divisors (see below), whose sum is σ = 45600. Its totient is φ = 44748.

The previous prime is 45161. The next prime is 45179. The reversal of 45173 is 37154.

It is a happy number.

45173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 45173 - 2⁸ = 44917 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45179) 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, 86 + ... + 312.

It is an arithmetic number, because the mean of its divisors is an integer number (11400).

2⁴⁵¹⁷³ is an apocalyptic number.

It is an amenable number.

45173 is a deficient number, since it is larger than the sum of its proper divisors (427).

45173 is a wasteful number, since it uses less digits than its factorization.

45173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426.

The product of its digits is 420, while the sum is 20.

The square root of 45173 is about 212.5394081106. The cubic root of 45173 is about 35.6144556872.

It can be divided in two parts, 451 and 73, that multiplied together give a palindrome (32923).

The spelling of 45173 in words is "forty-five thousand, one hundred seventy-three".