9925905 has 32 divisors (see below), whose sum is σ = 17740800. Its totient is φ = 4697280.

The previous prime is 9925891. The next prime is 9925907. The reversal of 9925905 is 5095299.

9925905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9925905 - 2⁴ = 9925889 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

9925905 is a lucky number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (9925907) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6396 + ... + 7794.

It is an arithmetic number, because the mean of its divisors is an integer number (554400).

Almost surely, 2^9925905 is an apocalyptic number.

It is an amenable number.

9925905 is a deficient number, since it is larger than the sum of its proper divisors (7814895).

9925905 is a wasteful number, since it uses less digits than its factorization.

9925905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461.

The product of its (nonzero) digits is 36450, while the sum is 39.

The square root of 9925905 is about 3150.5404298310. The cubic root of 9925905 is about 214.9100398836.

The spelling of 9925905 in words is "nine million, nine hundred twenty-five thousand, nine hundred five".