42905161 has 8 divisors (see below), whose sum is σ = 48923784. Its totient is φ = 37274880.

The previous prime is 42905141. The next prime is 42905171. The reversal of 42905161 is 16150924.

42905161 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 4 ways, for example, as 7728400 + 35176761 = 2780^2 + 5931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42905161 - 2⁷ = 42905033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42905111) 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 7 ways as a sum of consecutive naturals, for example, 96850 + ... + 97291.

It is an arithmetic number, because the mean of its divisors is an integer number (6115473).

Almost surely, 2^42905161 is an apocalyptic number.

It is an amenable number.

42905161 is a deficient number, since it is larger than the sum of its proper divisors (6018623).

42905161 is a wasteful number, since it uses less digits than its factorization.

42905161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194171.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 42905161 is about 6550.2031266213. The cubic root of 42905161 is about 350.0820515112.

The spelling of 42905161 in words is "forty-two million, nine hundred five thousand, one hundred sixty-one".