8421670925 has 12 divisors (see below), whose sum is σ = 10446876000. Its totient is φ = 6734753520.

The previous prime is 8421670867. The next prime is 8421670931. The reversal of 8421670925 is 5290761248.

It is a happy number.

It is not a de Polignac number, because 8421670925 - 2⁸ = 8421670669 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3326 + ... + 129824.

It is an arithmetic number, because the mean of its divisors is an integer number (870573000).

Almost surely, 2^8421670925 is an apocalyptic number.

It is an amenable number.

8421670925 is a deficient number, since it is larger than the sum of its proper divisors (2025205075).

8421670925 is a wasteful number, since it uses less digits than its factorization.

8421670925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129172 (or 129167 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 8421670925 is about 91769.6623345646. The cubic root of 8421670925 is about 2034.5393274937.

The spelling of 8421670925 in words is "eight billion, four hundred twenty-one million, six hundred seventy thousand, nine hundred twenty-five".