4044420421 has 4 divisors (see below), whose sum is σ = 4047120000. Its totient is φ = 4041720844.

The previous prime is 4044420397. The next prime is 4044420433. The reversal of 4044420421 is 1240244404.

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 a cyclic number.

It is not a de Polignac number, because 4044420421 - 2⁷ = 4044420293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4044420461) 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, 1347541 + ... + 1350538.

It is an arithmetic number, because the mean of its divisors is an integer number (1011780000).

Almost surely, 2^4044420421 is an apocalyptic number.

It is an amenable number.

4044420421 is a deficient number, since it is larger than the sum of its proper divisors (2699579).

4044420421 is a wasteful number, since it uses less digits than its factorization.

4044420421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2699578.

The product of its (nonzero) digits is 4096, while the sum is 25.

The square root of 4044420421 is about 63595.7578852552. The cubic root of 4044420421 is about 1593.2555189157.

Adding to 4044420421 its reverse (1240244404), we get a palindrome (5284664825).

The spelling of 4044420421 in words is "four billion, forty-four million, four hundred twenty thousand, four hundred twenty-one".