2320645 has 4 divisors (see below), whose sum is σ = 2784780. Its totient is φ = 1856512.

The previous prime is 2320639. The next prime is 2320649. The reversal of 2320645 is 5460232.

It is a happy number.

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 1397124 + 923521 = 1182^2 + 961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2320645 - 2¹¹ = 2318597 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2320649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232060 + ... + 232069.

It is an arithmetic number, because the mean of its divisors is an integer number (696195).

2^2320645 is an apocalyptic number.

It is an amenable number.

2320645 is a deficient number, since it is larger than the sum of its proper divisors (464135).

2320645 is an equidigital number, since it uses as much as digits as its factorization.

2320645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464134.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 2320645 is about 1523.3663380816. The cubic root of 2320645 is about 132.3943859943.

Adding to 2320645 its reverse (5460232), we get a palindrome (7780877).

The spelling of 2320645 in words is "two million, three hundred twenty thousand, six hundred forty-five".