2321845 has 8 divisors (see below), whose sum is σ = 2799576. Its totient is φ = 1848576.

The previous prime is 2321821. The next prime is 2321863. The reversal of 2321845 is 5481232.

It can be written as a sum of positive squares in 4 ways, for example, as 181476 + 2140369 = 426^2 + 1463^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2321845 - 2¹³ = 2313653 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 3¹³ + 2¹⁶ + 1 + 8⁶ + 4⁵ + 5⁸ .

It is a Duffinian number.

2321845 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169 + ... + 2161.

It is an arithmetic number, because the mean of its divisors is an integer number (349947).

2^2321845 is an apocalyptic number.

It is an amenable number.

2321845 is a deficient number, since it is larger than the sum of its proper divisors (477731).

2321845 is a wasteful number, since it uses less digits than its factorization.

2321845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231.

The product of its digits is 1920, while the sum is 25.

The square root of 2321845 is about 1523.7601517299. The cubic root of 2321845 is about 132.4172023358.

The spelling of 2321845 in words is "two million, three hundred twenty-one thousand, eight hundred forty-five".