3240021 has 4 divisors (see below), whose sum is σ = 4320032. Its totient is φ = 2160012.

The previous prime is 3240019. The next prime is 3240031. The reversal of 3240021 is 1200423.

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 3240021 - 2¹ = 3240019 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 = 3239979 and 3240006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3240031) 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, 540001 + ... + 540006.

It is an arithmetic number, because the mean of its divisors is an integer number (1080008).

Almost surely, 2^3240021 is an apocalyptic number.

It is an amenable number.

3240021 is a deficient number, since it is larger than the sum of its proper divisors (1080011).

3240021 is a wasteful number, since it uses less digits than its factorization.

3240021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080010.

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

The square root of 3240021 is about 1800.0058333239. The cubic root of 3240021 is about 147.9730441533.

Adding to 3240021 its reverse (1200423), we get a palindrome (4440444).

The spelling of 3240021 in words is "three million, two hundred forty thousand, twenty-one".