173445 has 16 divisors (see below), whose sum is σ = 287232. Its totient is φ = 89280.

The previous prime is 173431. The next prime is 173473. The reversal of 173445 is 544371.

It is not a de Polignac number, because 173445 - 2⁴ = 173429 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279 + ... + 651.

It is an arithmetic number, because the mean of its divisors is an integer number (17952).

2¹⁷³⁴⁴⁵ is an apocalyptic number.

173445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

173445 is a deficient number, since it is larger than the sum of its proper divisors (113787).

173445 is a wasteful number, since it uses less digits than its factorization.

173445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412.

The product of its digits is 1680, while the sum is 24.

The square root of 173445 is about 416.4672856300. The cubic root of 173445 is about 55.7682814558.

The spelling of 173445 in words is "one hundred seventy-three thousand, four hundred forty-five".