4401021 has 4 divisors (see below), whose sum is σ = 5868032. Its totient is φ = 2934012.

The previous prime is 4400993. The next prime is 4401043. The reversal of 4401021 is 1201044.

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 not a de Polignac number, because 4401021 - 2¹⁵ = 4368253 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4400988 and 4401006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4401071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 733501 + ... + 733506.

It is an arithmetic number, because the mean of its divisors is an integer number (1467008).

Almost surely, 2^4401021 is an apocalyptic number.

It is an amenable number.

4401021 is a deficient number, since it is larger than the sum of its proper divisors (1467011).

4401021 is a wasteful number, since it uses less digits than its factorization.

4401021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467010.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 4401021 is about 2097.8610535495. The cubic root of 4401021 is about 163.8769277917.

Adding to 4401021 its reverse (1201044), we get a palindrome (5602065).

The spelling of 4401021 in words is "four million, four hundred one thousand, twenty-one".