2445565 has 4 divisors (see below), whose sum is σ = 2934684. Its totient is φ = 1956448.

The previous prime is 2445557. The next prime is 2445571. The reversal of 2445565 is 5655442.

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 1104601 + 1340964 = 1051^2 + 1158^2 .

It is a cyclic number.

It is not a de Polignac number, because 2445565 - 2³ = 2445557 is a prime.

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, 244552 + ... + 244561.

It is an arithmetic number, because the mean of its divisors is an integer number (733671).

2^2445565 is an apocalyptic number.

It is an amenable number.

2445565 is a deficient number, since it is larger than the sum of its proper divisors (489119).

2445565 is an equidigital number, since it uses as much as digits as its factorization.

2445565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489118.

The product of its digits is 24000, while the sum is 31.

The square root of 2445565 is about 1563.8302337530. The cubic root of 2445565 is about 134.7285813337.

The spelling of 2445565 in words is "two million, four hundred forty-five thousand, five hundred sixty-five".