2321605 has 32 divisors (see below), whose sum is σ = 3483648. Its totient is φ = 1459200.

The previous prime is 2321603. The next prime is 2321623. The reversal of 2321605 is 5061232.

It is a happy number.

2321605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2321605 - 2¹ = 2321603 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 (2321603) 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 31 ways as a sum of consecutive naturals, for example, 12060 + ... + 12250.

It is an arithmetic number, because the mean of its divisors is an integer number (108864).

2^2321605 is an apocalyptic number.

It is an amenable number.

2321605 is a deficient number, since it is larger than the sum of its proper divisors (1162043).

2321605 is a wasteful number, since it uses less digits than its factorization.

2321605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 2321605 is about 1523.6813971431. The cubic root of 2321605 is about 132.4126396965.

Adding to 2321605 its reverse (5061232), we get a palindrome (7382837).

It can be divided in two parts, 2321 and 605, that added together give a triangular number (2926 = T₇₆).

The spelling of 2321605 in words is "two million, three hundred twenty-one thousand, six hundred five".