4043421001 has 4 divisors (see below), whose sum is σ = 4045612032. Its totient is φ = 4041229972.

The previous prime is 4043420977. The next prime is 4043421007. The reversal of 4043421001 is 1001243404.

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 4043421001 - 2¹³ = 4043412809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4043421001.

It is not an unprimeable number, because it can be changed into a prime (4043421007) 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, 1092745 + ... + 1096438.

It is an arithmetic number, because the mean of its divisors is an integer number (1011403008).

Almost surely, 2^4043421001 is an apocalyptic number.

It is an amenable number.

4043421001 is a deficient number, since it is larger than the sum of its proper divisors (2191031).

4043421001 is a wasteful number, since it uses less digits than its factorization.

4043421001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191030.

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

The square root of 4043421001 is about 63587.8998001978. The cubic root of 4043421001 is about 1593.1242712178.

Adding to 4043421001 its reverse (1001243404), we get a palindrome (5044664405).

The spelling of 4043421001 in words is "four billion, forty-three million, four hundred twenty-one thousand, one".