2891165 has 12 divisors (see below), whose sum is σ = 3556884. Its totient is φ = 2255616.

The previous prime is 2891137. The next prime is 2891171. The reversal of 2891165 is 5611982.

2891165 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 6 ways, for example, as 375769 + 2515396 = 613^2 + 1586^2 .

It is not a de Polignac number, because 2891165 - 2⁶ = 2891101 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32441 + ... + 32529.

It is an arithmetic number, because the mean of its divisors is an integer number (296407).

2^2891165 is an apocalyptic number.

It is an amenable number.

2891165 is a deficient number, since it is larger than the sum of its proper divisors (665719).

2891165 is an frugal number, since it uses more digits than its factorization.

2891165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 167 counting only the distinct ones).

The product of its digits is 4320, while the sum is 32.

The square root of 2891165 is about 1700.3426125343. The cubic root of 2891165 is about 142.4593502602.

The spelling of 2891165 in words is "two million, eight hundred ninety-one thousand, one hundred sixty-five".