2261165 has 4 divisors (see below), whose sum is σ = 2713404. Its totient is φ = 1808928.

The previous prime is 2261143. The next prime is 2261173. The reversal of 2261165 is 5611622.

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 630436 + 1630729 = 794^2 + 1277^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261165 - 2¹² = 2257069 is a prime.

It is a super-2 number, since 2×2261165² = 10225734314450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2261165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226112 + ... + 226121.

It is an arithmetic number, because the mean of its divisors is an integer number (678351).

2^2261165 is an apocalyptic number.

It is an amenable number.

2261165 is a deficient number, since it is larger than the sum of its proper divisors (452239).

2261165 is an equidigital number, since it uses as much as digits as its factorization.

2261165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452238.

The product of its digits is 720, while the sum is 23.

The square root of 2261165 is about 1503.7170611521. The cubic root of 2261165 is about 131.2534572030.

Adding to 2261165 its reverse (5611622), we get a palindrome (7872787).

The spelling of 2261165 in words is "two million, two hundred sixty-one thousand, one hundred sixty-five".