4004021441 has 16 divisors (see below), whose sum is σ = 4848750720. Its totient is φ = 3227769600.

The previous prime is 4004021431. The next prime is 4004021443. The reversal of 4004021441 is 1441204004.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-4004021441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4004021443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161075 + ... + 184263.

It is an arithmetic number, because the mean of its divisors is an integer number (303046920).

Almost surely, 2^4004021441 is an apocalyptic number.

It is an amenable number.

4004021441 is a deficient number, since it is larger than the sum of its proper divisors (844729279).

4004021441 is a wasteful number, since it uses less digits than its factorization.

4004021441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24664.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 4004021441 is about 63277.3374992975. The cubic root of 4004021441 is about 1587.9328437667.

Adding to 4004021441 its reverse (1441204004), we get a palindrome (5445225445).

The spelling of 4004021441 in words is "four billion, four million, twenty-one thousand, four hundred forty-one".