2165145 has 32 divisors (see below), whose sum is σ = 3732480. Its totient is φ = 1068480.

The previous prime is 2165143. The next prime is 2165147. The reversal of 2165145 is 5415612.

It is an interprime number because it is at equal distance from previous prime (2165143) and next prime (2165147).

It is not a de Polignac number, because 2165145 - 2¹ = 2165143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20182 + ... + 20288.

It is an arithmetic number, because the mean of its divisors is an integer number (116640).

2^2165145 is an apocalyptic number.

It is an amenable number.

2165145 is a deficient number, since it is larger than the sum of its proper divisors (1567335).

2165145 is a wasteful number, since it uses less digits than its factorization.

2165145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205.

The product of its digits is 1200, while the sum is 24.

The square root of 2165145 is about 1471.4431691370. The cubic root of 2165145 is about 129.3686348942.

The spelling of 2165145 in words is "two million, one hundred sixty-five thousand, one hundred forty-five".