42809157 has 12 divisors (see below), whose sum is σ = 62131264. Its totient is φ = 28402920.

The previous prime is 42809149. The next prime is 42809167. The reversal of 42809157 is 75190824.

42809157 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 42809157 - 2³ = 42809149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42809167) 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, 9373 + ... + 13170.

Almost surely, 2^42809157 is an apocalyptic number.

It is an amenable number.

42809157 is a deficient number, since it is larger than the sum of its proper divisors (19322107).

42809157 is a wasteful number, since it uses less digits than its factorization.

42809157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22760 (or 22757 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 42809157 is about 6542.8707002355. The cubic root of 42809157 is about 349.8207435816.

The spelling of 42809157 in words is "forty-two million, eight hundred nine thousand, one hundred fifty-seven".