445012121 has 4 divisors (see below), whose sum is σ = 454480512. Its totient is φ = 435543732.

The previous prime is 445012103. The next prime is 445012133. The reversal of 445012121 is 121210544.

It is a happy number.

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 445012121 - 2¹⁰ = 445011097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 445012093 and 445012102.

It is not an unprimeable number, because it can be changed into a prime (445012151) 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, 4734125 + ... + 4734218.

It is an arithmetic number, because the mean of its divisors is an integer number (113620128).

Almost surely, 2^445012121 is an apocalyptic number.

It is an amenable number.

445012121 is a deficient number, since it is larger than the sum of its proper divisors (9468391).

445012121 is an equidigital number, since it uses as much as digits as its factorization.

445012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9468390.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 445012121 is about 21095.3104030256. The cubic root of 445012121 is about 763.4676038517.

Adding to 445012121 its reverse (121210544), we get a palindrome (566222665).

The spelling of 445012121 in words is "four hundred forty-five million, twelve thousand, one hundred twenty-one".