2040321 has 4 divisors (see below), whose sum is σ = 2720432. Its totient is φ = 1360212.

The previous prime is 2040319. The next prime is 2040331. The reversal of 2040321 is 1230402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2040321 - 2¹ = 2040319 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2040297 and 2040306.

It is not an unprimeable number, because it can be changed into a prime (2040331) 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, 340051 + ... + 340056.

It is an arithmetic number, because the mean of its divisors is an integer number (680108).

2^2040321 is an apocalyptic number.

It is an amenable number.

2040321 is a deficient number, since it is larger than the sum of its proper divisors (680111).

2040321 is an equidigital number, since it uses as much as digits as its factorization.

2040321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680110.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 2040321 is about 1428.3980537651. The cubic root of 2040321 is about 126.8331659338.

Adding to 2040321 its reverse (1230402), we get a palindrome (3270723).

The spelling of 2040321 in words is "two million, forty thousand, three hundred twenty-one".