2641565 has 4 divisors (see below), whose sum is σ = 3169884. Its totient is φ = 2113248.

The previous prime is 2641559. The next prime is 2641567. The reversal of 2641565 is 5651462.

2641565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1138489 + 1503076 = 1067^2 + 1226^2 .

It is a cyclic number.

It is not a de Polignac number, because 2641565 - 2⁴ = 2641549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2641567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264152 + ... + 264161.

It is an arithmetic number, because the mean of its divisors is an integer number (792471).

2^2641565 is an apocalyptic number.

It is an amenable number.

2641565 is a deficient number, since it is larger than the sum of its proper divisors (528319).

2641565 is an equidigital number, since it uses as much as digits as its factorization.

2641565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528318.

The product of its digits is 7200, while the sum is 29.

The square root of 2641565 is about 1625.2892050340. The cubic root of 2641565 is about 138.2357693377.

The spelling of 2641565 in words is "two million, six hundred forty-one thousand, five hundred sixty-five".