8421925 has 12 divisors (see below), whose sum is σ = 10781056. Its totient is φ = 6519600.

The previous prime is 8421923. The next prime is 8421929. The reversal of 8421925 is 5291248.

It is not a de Polignac number, because 8421925 - 2¹ = 8421923 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4659 + ... + 6208.

Almost surely, 2^8421925 is an apocalyptic number.

It is an amenable number.

8421925 is a deficient number, since it is larger than the sum of its proper divisors (2359131).

8421925 is a wasteful number, since it uses less digits than its factorization.

8421925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10908 (or 10903 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 8421925 is about 2902.0553061580. The cubic root of 8421925 is about 203.4559787423.

The spelling of 8421925 in words is "eight million, four hundred twenty-one thousand, nine hundred twenty-five".