8445121 has 4 divisors (see below), whose sum is σ = 8540100. Its totient is φ = 8350144.

The previous prime is 8445109. The next prime is 8445137. The reversal of 8445121 is 1215448.

8445121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 5948721 + 2496400 = 2439^2 + 1580^2 .

It is a cyclic number.

It is not a de Polignac number, because 8445121 - 2⁵ = 8445089 is a prime.

It is a Duffinian number.

8445121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8445161) 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, 47356 + ... + 47533.

It is an arithmetic number, because the mean of its divisors is an integer number (2135025).

Almost surely, 2^8445121 is an apocalyptic number.

It is an amenable number.

8445121 is a deficient number, since it is larger than the sum of its proper divisors (94979).

8445121 is an equidigital number, since it uses as much as digits as its factorization.

8445121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94978.

The product of its digits is 1280, while the sum is 25.

The square root of 8445121 is about 2906.0490360625. The cubic root of 8445121 is about 203.6425963603.

The spelling of 8445121 in words is "eight million, four hundred forty-five thousand, one hundred twenty-one".