445456021 has 8 divisors (see below), whose sum is σ = 456614424. Its totient is φ = 434311680.

The previous prime is 445456013. The next prime is 445456027. The reversal of 445456021 is 120654544.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15100996 + 430355025 = 3886^2 + 20745^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 445456021 - 2³ = 445456013 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 (445456027) 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, 93325 + ... + 97981.

It is an arithmetic number, because the mean of its divisors is an integer number (57076803).

Almost surely, 2^445456021 is an apocalyptic number.

445456021 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

445456021 is a deficient number, since it is larger than the sum of its proper divisors (11158403).

445456021 is a wasteful number, since it uses less digits than its factorization.

445456021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7031.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 445456021 is about 21105.8290763476. The cubic root of 445456021 is about 763.7213727045.

The spelling of 445456021 in words is "four hundred forty-five million, four hundred fifty-six thousand, twenty-one".