4445021 has 4 divisors (see below), whose sum is σ = 5080032. Its totient is φ = 3810012.

The previous prime is 4445017. The next prime is 4445027. The reversal of 4445021 is 1205444.

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 4445021 - 2² = 4445017 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 4444984 and 4445002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4445027) 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, 317495 + ... + 317508.

It is an arithmetic number, because the mean of its divisors is an integer number (1270008).

Almost surely, 2^4445021 is an apocalyptic number.

It is an amenable number.

4445021 is a deficient number, since it is larger than the sum of its proper divisors (635011).

4445021 is an equidigital number, since it uses as much as digits as its factorization.

4445021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635010.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 4445021 is about 2108.3218445010. The cubic root of 4445021 is about 164.4212475227.

The spelling of 4445021 in words is "four million, four hundred forty-five thousand, twenty-one".