8129925 has 36 divisors (see below), whose sum is σ = 15204384. Its totient is φ = 4144800.

The previous prime is 8129923. The next prime is 8129939. The reversal of 8129925 is 5299218.

It is not a de Polignac number, because 8129925 - 2¹ = 8129923 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 8129925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8129921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4390 + ... + 5960.

It is an arithmetic number, because the mean of its divisors is an integer number (422344).

Almost surely, 2^8129925 is an apocalyptic number.

It is an amenable number.

8129925 is a deficient number, since it is larger than the sum of its proper divisors (7074459).

8129925 is a wasteful number, since it uses less digits than its factorization.

8129925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610 (or 1602 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 8129925 is about 2851.3023340221. The cubic root of 8129925 is about 201.0768993647.

The spelling of 8129925 in words is "eight million, one hundred twenty-nine thousand, nine hundred twenty-five".