2391165 has 24 divisors (see below), whose sum is σ = 4737408. Its totient is φ = 1092960.

The previous prime is 2391157. The next prime is 2391167. The reversal of 2391165 is 5611932.

It is not a de Polignac number, because 2391165 - 2³ = 2391157 is a prime.

2391165 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2391167) 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 23 ways as a sum of consecutive naturals, for example, 3481 + ... + 4110.

It is an arithmetic number, because the mean of its divisors is an integer number (197392).

2^2391165 is an apocalyptic number.

It is an amenable number.

2391165 is a deficient number, since it is larger than the sum of its proper divisors (2346243).

2391165 is a wasteful number, since it uses less digits than its factorization.

2391165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7609 (or 7606 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 2391165 is about 1546.3392253965. The cubic root of 2391165 is about 133.7220980024.

It can be divided in two parts, 239116 and 5, that added together give a square (239121 = 489²).

The spelling of 2391165 in words is "two million, three hundred ninety-one thousand, one hundred sixty-five".