2128173 has 8 divisors (see below), whose sum is σ = 2847936. Its totient is φ = 1413600.

The previous prime is 2128157. The next prime is 2128177. The reversal of 2128173 is 3718212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2128173 - 2⁴ = 2128157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208 + ... + 2073.

It is an arithmetic number, because the mean of its divisors is an integer number (355992).

2^2128173 is an apocalyptic number.

It is an amenable number.

2128173 is a deficient number, since it is larger than the sum of its proper divisors (719763).

2128173 is a wasteful number, since it uses less digits than its factorization.

2128173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2595.

The product of its digits is 672, while the sum is 24.

The square root of 2128173 is about 1458.8258977685. The cubic root of 2128173 is about 128.6280373295.

It can be divided in two parts, 212 and 8173, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 2128173 in words is "two million, one hundred twenty-eight thousand, one hundred seventy-three".