445023121 has 4 divisors (see below), whose sum is σ = 452318644. Its totient is φ = 437727600.

The previous prime is 445023097. The next prime is 445023133. The reversal of 445023121 is 121320544.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 126900225 + 318122896 = 11265^2 + 17836^2 .

It is a cyclic number.

It is not a de Polignac number, because 445023121 - 2¹⁹ = 444498833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 445023092 and 445023101.

It is not an unprimeable number, because it can be changed into a prime (445023421) 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, 3647670 + ... + 3647791.

It is an arithmetic number, because the mean of its divisors is an integer number (113079661).

Almost surely, 2^445023121 is an apocalyptic number.

It is an amenable number.

445023121 is a deficient number, since it is larger than the sum of its proper divisors (7295523).

445023121 is an equidigital number, since it uses as much as digits as its factorization.

445023121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7295522.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 445023121 is about 21095.5711228684. The cubic root of 445023121 is about 763.4738943728.

Adding to 445023121 its reverse (121320544), we get a palindrome (566343665).

The spelling of 445023121 in words is "four hundred forty-five million, twenty-three thousand, one hundred twenty-one".