2721165 has 16 divisors (see below), whose sum is σ = 4472448. Its totient is φ = 1411776.

The previous prime is 2721163. The next prime is 2721167. The reversal of 2721165 is 5611272.

It is an interprime number because it is at equal distance from previous prime (2721163) and next prime (2721167).

It is not a de Polignac number, because 2721165 - 2¹ = 2721163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1897 + ... + 3006.

It is an arithmetic number, because the mean of its divisors is an integer number (279528).

2^2721165 is an apocalyptic number.

It is an amenable number.

2721165 is a deficient number, since it is larger than the sum of its proper divisors (1751283).

2721165 is a wasteful number, since it uses less digits than its factorization.

2721165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4948.

The product of its digits is 840, while the sum is 24.

The square root of 2721165 is about 1649.5954049403. The cubic root of 2721165 is about 139.6105673946.

The spelling of 2721165 in words is "two million, seven hundred twenty-one thousand, one hundred sixty-five".