2591165 has 4 divisors (see below), whose sum is σ = 3109404. Its totient is φ = 2072928.

The previous prime is 2591153. The next prime is 2591167. The reversal of 2591165 is 5611952.

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 391876 + 2199289 = 626^2 + 1483^2 .

It is a cyclic number.

It is not a de Polignac number, because 2591165 - 2⁸ = 2590909 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2591167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259112 + ... + 259121.

It is an arithmetic number, because the mean of its divisors is an integer number (777351).

2^2591165 is an apocalyptic number.

It is an amenable number.

2591165 is a deficient number, since it is larger than the sum of its proper divisors (518239).

2591165 is an equidigital number, since it uses as much as digits as its factorization.

2591165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518238.

The product of its digits is 2700, while the sum is 29.

The square root of 2591165 is about 1609.7096011393. The cubic root of 2591165 is about 137.3509569606.

The spelling of 2591165 in words is "two million, five hundred ninety-one thousand, one hundred sixty-five".