3240042021 has 12 divisors (see below), whose sum is σ = 4681855360. Its totient is φ = 2159199720.

The previous prime is 3240041999. The next prime is 3240042049. The reversal of 3240042021 is 1202400423.

3240042021 is a `hidden beast` number, since 3 + 240 + 0 + 420 + 2 + 1 = 666.

It is not a de Polignac number, because 3240042021 - 2⁵ = 3240041989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3240041985 and 3240042003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3240042521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43765 + ... + 91626.

Almost surely, 2^3240042021 is an apocalyptic number.

It is an amenable number.

3240042021 is a deficient number, since it is larger than the sum of its proper divisors (1441813339).

3240042021 is a wasteful number, since it uses less digits than its factorization.

3240042021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138056 (or 138053 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 3240042021 is about 56921.3669986939. The cubic root of 3240042021 is about 1479.7336416507.

Adding to 3240042021 its reverse (1202400423), we get a palindrome (4442442444).

The spelling of 3240042021 in words is "three billion, two hundred forty million, forty-two thousand, twenty-one".