8421295925 has 24 divisors (see below), whose sum is σ = 11938819200. Its totient is φ = 5772358080.

The previous prime is 8421295921. The next prime is 8421295963. The reversal of 8421295925 is 5295921248.

It is not a de Polignac number, because 8421295925 - 2² = 8421295921 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8421295925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421295921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 531011 + ... + 546639.

It is an arithmetic number, because the mean of its divisors is an integer number (497450800).

Almost surely, 2^8421295925 is an apocalyptic number.

It is an amenable number.

8421295925 is a deficient number, since it is larger than the sum of its proper divisors (3517523275).

8421295925 is a wasteful number, since it uses less digits than its factorization.

8421295925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18725 (or 18720 counting only the distinct ones).

The product of its digits is 518400, while the sum is 47.

The square root of 8421295925 is about 91767.6191529452. The cubic root of 8421295925 is about 2034.5091290695.

The spelling of 8421295925 in words is "eight billion, four hundred twenty-one million, two hundred ninety-five thousand, nine hundred twenty-five".