445425521 has 4 divisors (see below), whose sum is σ = 464791872. Its totient is φ = 426059172.

The previous prime is 445425503. The next prime is 445425527. The reversal of 445425521 is 125524544.

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 445425521 - 2¹⁴ = 445409137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445425527) 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, 9683141 + ... + 9683186.

It is an arithmetic number, because the mean of its divisors is an integer number (116197968).

Almost surely, 2^445425521 is an apocalyptic number.

It is an amenable number.

445425521 is a deficient number, since it is larger than the sum of its proper divisors (19366351).

445425521 is a wasteful number, since it uses less digits than its factorization.

445425521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19366350.

The product of its digits is 32000, while the sum is 32.

The square root of 445425521 is about 21105.1065147750. The cubic root of 445425521 is about 763.7039418528.

The spelling of 445425521 in words is "four hundred forty-five million, four hundred twenty-five thousand, five hundred twenty-one".