2122165 has 4 divisors (see below), whose sum is σ = 2546604. Its totient is φ = 1697728.

The previous prime is 2122163. The next prime is 2122181. The reversal of 2122165 is 5612212.

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 248004 + 1874161 = 498^2 + 1369^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122165 - 2¹ = 2122163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122163) 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, 212212 + ... + 212221.

It is an arithmetic number, because the mean of its divisors is an integer number (636651).

2^2122165 is an apocalyptic number.

It is an amenable number.

2122165 is a deficient number, since it is larger than the sum of its proper divisors (424439).

2122165 is an equidigital number, since it uses as much as digits as its factorization.

2122165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424438.

The product of its digits is 240, while the sum is 19.

The square root of 2122165 is about 1456.7652521941. The cubic root of 2122165 is about 128.5068808864.

Adding to 2122165 its reverse (5612212), we get a palindrome (7734377).

The spelling of 2122165 in words is "two million, one hundred twenty-two thousand, one hundred sixty-five".