2320405 has 4 divisors (see below), whose sum is σ = 2784492. Its totient is φ = 1856320.

The previous prime is 2320399. The next prime is 2320421. The reversal of 2320405 is 5040232.

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 1739761 + 580644 = 1319^2 + 762^2 .

It is not a de Polignac number, because 2320405 - 2³ = 2320397 is a prime.

It is an Ulam 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, 232036 + ... + 232045.

It is an arithmetic number, because the mean of its divisors is an integer number (696123).

2^2320405 is an apocalyptic number.

It is an amenable number.

2320405 is a deficient number, since it is larger than the sum of its proper divisors (464087).

2320405 is an equidigital number, since it uses as much as digits as its factorization.

2320405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464086.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 2320405 is about 1523.2875631344. The cubic root of 2320405 is about 132.3898217822.

Adding to 2320405 its reverse (5040232), we get a palindrome (7360637).

The spelling of 2320405 in words is "two million, three hundred twenty thousand, four hundred five".