2173585 has 4 divisors (see below), whose sum is σ = 2608308. Its totient is φ = 1738864.

The previous prime is 2173573. The next prime is 2173601. The reversal of 2173585 is 5853712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1181569 + 992016 = 1087^2 + 996^2 .

It is a cyclic number.

It is not a de Polignac number, because 2173585 - 2⁵ = 2173553 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

2173585 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217354 + ... + 217363.

It is an arithmetic number, because the mean of its divisors is an integer number (652077).

2^2173585 is an apocalyptic number.

It is an amenable number.

2173585 is a deficient number, since it is larger than the sum of its proper divisors (434723).

2173585 is an equidigital number, since it uses as much as digits as its factorization.

2173585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434722.

The product of its digits is 8400, while the sum is 31.

The square root of 2173585 is about 1474.3083123960. The cubic root of 2173585 is about 129.5365151969.

The spelling of 2173585 in words is "two million, one hundred seventy-three thousand, five hundred eighty-five".