2261965 has 4 divisors (see below), whose sum is σ = 2714364. Its totient is φ = 1809568.

The previous prime is 2261933. The next prime is 2261993. The reversal of 2261965 is 5691622.

2261965 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5691622 = 2 ⋅2845811.

It can be written as a sum of positive squares in 2 ways, for example, as 574564 + 1687401 = 758^2 + 1299^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261965 - 2⁵ = 2261933 is a prime.

It is a super-2 number, since 2×2261965² = 10232971322450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 3 ways as a sum of consecutive naturals, for example, 226192 + ... + 226201.

It is an arithmetic number, because the mean of its divisors is an integer number (678591).

2^2261965 is an apocalyptic number.

It is an amenable number.

2261965 is a deficient number, since it is larger than the sum of its proper divisors (452399).

2261965 is an equidigital number, since it uses as much as digits as its factorization.

2261965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452398.

The product of its digits is 6480, while the sum is 31.

The square root of 2261965 is about 1503.9830451172. The cubic root of 2261965 is about 131.2689345321.

The spelling of 2261965 in words is "two million, two hundred sixty-one thousand, nine hundred sixty-five".