42911925 has 24 divisors (see below), whose sum is σ = 81084096. Its totient is φ = 19616640.

The previous prime is 42911917. The next prime is 42911929. The reversal of 42911925 is 52911924.

42911925 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 42911925 - 2³ = 42911917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42911929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40344 + ... + 41393.

It is an arithmetic number, because the mean of its divisors is an integer number (3378504).

Almost surely, 2^42911925 is an apocalyptic number.

It is an amenable number.

42911925 is a deficient number, since it is larger than the sum of its proper divisors (38172171).

42911925 is a wasteful number, since it uses less digits than its factorization.

42911925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81757 (or 81752 counting only the distinct ones).

The product of its digits is 6480, while the sum is 33.

The square root of 42911925 is about 6550.7194261394. The cubic root of 42911925 is about 350.1004473601.

Subtracting 42911925 from its reverse (52911924), we obtain a palindrome (9999999).

It can be divided in two parts, 4291 and 1925, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 42911925 in words is "forty-two million, nine hundred eleven thousand, nine hundred twenty-five".