2101165 has 24 divisors (see below), whose sum is σ = 2911104. Its totient is φ = 1452000.

The previous prime is 2101157. The next prime is 2101181. The reversal of 2101165 is 5611012.

It is a happy number.

It is not a de Polignac number, because 2101165 - 2³ = 2101157 is a prime.

It is a Duffinian number.

2101165 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13840 + ... + 13990.

It is an arithmetic number, because the mean of its divisors is an integer number (121296).

2^2101165 is an apocalyptic number.

It is an amenable number.

2101165 is a deficient number, since it is larger than the sum of its proper divisors (809939).

2101165 is a wasteful number, since it uses less digits than its factorization.

2101165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 2101165 is about 1449.5395820743. The cubic root of 2101165 is about 128.0815926723.

Adding to 2101165 its reverse (5611012), we get a palindrome (7712177).

It can be divided in two parts, 210 and 1165, that multiplied together give a triangular number (244650 = T₆₉₉).

The spelling of 2101165 in words is "two million, one hundred one thousand, one hundred sixty-five".