42906725 has 12 divisors (see below), whose sum is σ = 56334564. Its totient is φ = 32305920.

The previous prime is 42906713. The next prime is 42906727. The reversal of 42906725 is 52760924.

42906725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 1136356 + 41770369 = 1066^2 + 6463^2 .

It is not a de Polignac number, because 42906725 - 2⁴ = 42906709 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42906727) 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 11 ways as a sum of consecutive naturals, for example, 50054 + ... + 50903.

It is an arithmetic number, because the mean of its divisors is an integer number (4694547).

Almost surely, 2^42906725 is an apocalyptic number.

It is an amenable number.

42906725 is a deficient number, since it is larger than the sum of its proper divisors (13427839).

42906725 is a wasteful number, since it uses less digits than its factorization.

42906725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100984 (or 100979 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 42906725 is about 6550.3225111440. The cubic root of 42906725 is about 350.0863052472.

The spelling of 42906725 in words is "forty-two million, nine hundred six thousand, seven hundred twenty-five".