445360021 has 8 divisors (see below), whose sum is σ = 448257888. Its totient is φ = 442470000.

The previous prime is 445359997. The next prime is 445360037. The reversal of 445360021 is 120063544.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445360021 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 (445360121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146406 + ... + 149416.

It is an arithmetic number, because the mean of its divisors is an integer number (56032236).

Almost surely, 2^445360021 is an apocalyptic number.

It is an amenable number.

445360021 is a deficient number, since it is larger than the sum of its proper divisors (2897867).

445360021 is a wasteful number, since it uses less digits than its factorization.

445360021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3923.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 445360021 is about 21103.5547005712. The cubic root of 445360021 is about 763.6665056950. Note that the first 3 decimals are identical.

The spelling of 445360021 in words is "four hundred forty-five million, three hundred sixty thousand, twenty-one".