8442621245 has 4 divisors (see below), whose sum is σ = 10131145500. Its totient is φ = 6754096992.

The previous prime is 8442621223. The next prime is 8442621263. The reversal of 8442621245 is 5421262448.

8442621245 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 4639925689 + 3802695556 = 68117^2 + 61666^2 .

It is a cyclic number.

It is not a de Polignac number, because 8442621245 - 2²⁰ = 8441572669 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8442621199 and 8442621208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 844262120 + ... + 844262129.

It is an arithmetic number, because the mean of its divisors is an integer number (2532786375).

Almost surely, 2^8442621245 is an apocalyptic number.

It is an amenable number.

8442621245 is a deficient number, since it is larger than the sum of its proper divisors (1688524255).

8442621245 is a wasteful number, since it uses less digits than its factorization.

8442621245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688524254.

The product of its digits is 122880, while the sum is 38.

The square root of 8442621245 is about 91883.7376525357. The cubic root of 8442621245 is about 2036.2250164786.

The spelling of 8442621245 in words is "eight billion, four hundred forty-two million, six hundred twenty-one thousand, two hundred forty-five".