2165285 has 16 divisors (see below), whose sum is σ = 2732400. Its totient is φ = 1645056.

The previous prime is 2165249. The next prime is 2165291. The reversal of 2165285 is 5825612.

It can be written as a sum of positive squares in 8 ways, for example, as 16129 + 2149156 = 127^2 + 1466^2 .

It is a cyclic number.

It is not a de Polignac number, because 2165285 - 2⁸ = 2165029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 15737 + ... + 15873.

It is an arithmetic number, because the mean of its divisors is an integer number (170775).

2^2165285 is an apocalyptic number.

It is an amenable number.

2165285 is a deficient number, since it is larger than the sum of its proper divisors (567115).

2165285 is a wasteful number, since it uses less digits than its factorization.

2165285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280.

The product of its digits is 4800, while the sum is 29.

The square root of 2165285 is about 1471.4907407116. The cubic root of 2165285 is about 129.3714231938.

The spelling of 2165285 in words is "two million, one hundred sixty-five thousand, two hundred eighty-five".