8405425 has 24 divisors (see below), whose sum is σ = 12199616. Its totient is φ = 5624640.

The previous prime is 8405417. The next prime is 8405431. The reversal of 8405425 is 5245048.

It is not a de Polignac number, because 8405425 - 2³ = 8405417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8405393 and 8405402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6967 + ... + 8083.

Almost surely, 2^8405425 is an apocalyptic number.

It is an amenable number.

8405425 is a deficient number, since it is larger than the sum of its proper divisors (3794191).

8405425 is a wasteful number, since it uses less digits than its factorization.

8405425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177 (or 1172 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 8405425 is about 2899.2110995924. The cubic root of 8405425 is about 203.3230234553.

The spelling of 8405425 in words is "eight million, four hundred five thousand, four hundred twenty-five".