4021441 has 4 divisors (see below), whose sum is σ = 4030000. Its totient is φ = 4012884.

The previous prime is 4021439. The next prime is 4021447. The reversal of 4021441 is 1441204.

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 4021441 - 2¹ = 4021439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4021447) 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, 3531 + ... + 4528.

It is an arithmetic number, because the mean of its divisors is an integer number (1007500).

Almost surely, 2^4021441 is an apocalyptic number.

It is an amenable number.

4021441 is a deficient number, since it is larger than the sum of its proper divisors (8559).

4021441 is an equidigital number, since it uses as much as digits as its factorization.

4021441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8558.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 4021441 is about 2005.3530861173. The cubic root of 4021441 is about 159.0232288096.

Adding to 4021441 its reverse (1441204), we get a palindrome (5462645).

The spelling of 4021441 in words is "four million, twenty-one thousand, four hundred forty-one".