4013040421 has 4 divisors (see below), whose sum is σ = 4321735852. Its totient is φ = 3704344992.

The previous prime is 4013040413. The next prime is 4013040443. The reversal of 4013040421 is 1240403104.

4013040421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1416016900 + 2597023521 = 37630^2 + 50961^2 .

It is a cyclic number.

It is not a de Polignac number, because 4013040421 - 2³ = 4013040413 is a prime.

It is a super-2 number, since 2×4013040421² = 32208986841159714482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4013040401) 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, 154347696 + ... + 154347721.

It is an arithmetic number, because the mean of its divisors is an integer number (1080433963).

Almost surely, 2^4013040421 is an apocalyptic number.

It is an amenable number.

4013040421 is a deficient number, since it is larger than the sum of its proper divisors (308695431).

4013040421 is a wasteful number, since it uses less digits than its factorization.

4013040421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308695430.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 4013040421 is about 63348.5628960910. The cubic root of 4013040421 is about 1589.1242122624.

Adding to 4013040421 its reverse (1240403104), we get a palindrome (5253443525).

The spelling of 4013040421 in words is "four billion, thirteen million, forty thousand, four hundred twenty-one".