8425045921 has 4 divisors (see below), whose sum is σ = 8425325844. Its totient is φ = 8424766000.

The previous prime is 8425045913. The next prime is 8425045957. The reversal of 8425045921 is 1295405248.

It is a happy number.

8425045921 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 1608892321 + 6816153600 = 40111^2 + 82560^2 .

It is a cyclic number.

It is not a de Polignac number, because 8425045921 - 2³ = 8425045913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8425045961) 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, 88510 + ... + 157111.

It is an arithmetic number, because the mean of its divisors is an integer number (2106331461).

Almost surely, 2^8425045921 is an apocalyptic number.

It is an amenable number.

8425045921 is a deficient number, since it is larger than the sum of its proper divisors (279923).

8425045921 is a wasteful number, since it uses less digits than its factorization.

8425045921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279922.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 8425045921 is about 91788.0489007147. The cubic root of 8425045921 is about 2034.8110726575.

The spelling of 8425045921 in words is "eight billion, four hundred twenty-five million, forty-five thousand, nine hundred twenty-one".