445004561 has 4 divisors (see below), whose sum is σ = 447490800. Its totient is φ = 442518324.

The previous prime is 445004557. The next prime is 445004617. The reversal of 445004561 is 165400544.

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 445004561 - 2² = 445004557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445004501) 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, 1242851 + ... + 1243208.

It is an arithmetic number, because the mean of its divisors is an integer number (111872700).

Almost surely, 2^445004561 is an apocalyptic number.

It is an amenable number.

445004561 is a deficient number, since it is larger than the sum of its proper divisors (2486239).

445004561 is a wasteful number, since it uses less digits than its factorization.

445004561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486238.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 445004561 is about 21095.1312155199. The cubic root of 445004561 is about 763.4632804880.

The spelling of 445004561 in words is "four hundred forty-five million, four thousand, five hundred sixty-one".