2321865 has 84 divisors (see below), whose sum is σ = 5233284. Its totient is φ = 979776.

The previous prime is 2321863. The next prime is 2321881. The reversal of 2321865 is 5681232.

It can be written as a sum of positive squares in 2 ways, for example, as 571536 + 1750329 = 756^2 + 1323^2 .

It is not a de Polignac number, because 2321865 - 2¹ = 2321863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 (2321863) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 178599 + ... + 178611.

It is an arithmetic number, because the mean of its divisors is an integer number (62301).

2^2321865 is an apocalyptic number.

It is an amenable number.

2321865 is an abundant number, since it is smaller than the sum of its proper divisors (2911419).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2321865 is an equidigital number, since it uses as much as digits as its factorization.

2321865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50 (or 28 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2321865 is about 1523.7667144284. The cubic root of 2321865 is about 132.4175825416.

The spelling of 2321865 in words is "two million, three hundred twenty-one thousand, eight hundred sixty-five".