445534021 has 4 divisors (see below), whose sum is σ = 468983200. Its totient is φ = 422084844.

The previous prime is 445533973. The next prime is 445534069. The reversal of 445534021 is 120435544.

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 an interprime number because it is at equal distance from previous prime (445533973) and next prime (445534069).

It is a cyclic number.

It is not a de Polignac number, because 445534021 - 2¹¹ = 445531973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445534091) 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, 11724561 + ... + 11724598.

It is an arithmetic number, because the mean of its divisors is an integer number (117245800).

Almost surely, 2^445534021 is an apocalyptic number.

It is an amenable number.

445534021 is a deficient number, since it is larger than the sum of its proper divisors (23449179).

445534021 is a wasteful number, since it uses less digits than its factorization.

445534021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23449178.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 445534021 is about 21107.6768262166. The cubic root of 445534021 is about 763.7659463456.

Adding to 445534021 its reverse (120435544), we get a palindrome (565969565).

The spelling of 445534021 in words is "four hundred forty-five million, five hundred thirty-four thousand, twenty-one".