4004442421 has 4 divisors (see below), whose sum is σ = 4576505632. Its totient is φ = 3432379212.

The previous prime is 4004442419. The next prime is 4004442433. The reversal of 4004442421 is 1242444004.

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 4004442421 - 2¹ = 4004442419 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 (4004442721) 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, 286031595 + ... + 286031608.

It is an arithmetic number, because the mean of its divisors is an integer number (1144126408).

Almost surely, 2^4004442421 is an apocalyptic number.

It is an amenable number.

4004442421 is a deficient number, since it is larger than the sum of its proper divisors (572063211).

4004442421 is an equidigital number, since it uses as much as digits as its factorization.

4004442421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572063210.

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

The square root of 4004442421 is about 63280.6638792609. The cubic root of 4004442421 is about 1587.9884931975.

Adding to 4004442421 its reverse (1242444004), we get a palindrome (5246886425).

The spelling of 4004442421 in words is "four billion, four million, four hundred forty-two thousand, four hundred twenty-one".