8409925 has 6 divisors (see below), whose sum is σ = 10428338. Its totient is φ = 6727920.

The previous prime is 8409899. The next prime is 8409931. The reversal of 8409925 is 5299048.

8409925 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 2563201 + 5846724 = 1601^2 + 2418^2 .

It is not a de Polignac number, because 8409925 - 2⁹ = 8409413 is a prime.

It is a Duffinian number.

8409925 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168174 + ... + 168223.

Almost surely, 2^8409925 is an apocalyptic number.

It is an amenable number.

8409925 is a deficient number, since it is larger than the sum of its proper divisors (2018413).

8409925 is a wasteful number, since it uses less digits than its factorization.

8409925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336407 (or 336402 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 8409925 is about 2899.9870689367. The cubic root of 8409925 is about 203.3593012312.

The spelling of 8409925 in words is "eight million, four hundred nine thousand, nine hundred twenty-five".