42581157 has 16 divisors (see below), whose sum is σ = 57849792. Its totient is φ = 27855360.

The previous prime is 42581153. The next prime is 42581171. The reversal of 42581157 is 75118524.

42581157 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 42581157 - 2² = 42581153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42581153) 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 15 ways as a sum of consecutive naturals, for example, 37563 + ... + 38679.

It is an arithmetic number, because the mean of its divisors is an integer number (3615612).

Almost surely, 2^42581157 is an apocalyptic number.

It is an amenable number.

42581157 is a deficient number, since it is larger than the sum of its proper divisors (15268635).

42581157 is a wasteful number, since it uses less digits than its factorization.

42581157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348.

The product of its digits is 11200, while the sum is 33.

The square root of 42581157 is about 6525.4238942769. The cubic root of 42581157 is about 349.1985936051.

The spelling of 42581157 in words is "forty-two million, five hundred eighty-one thousand, one hundred fifty-seven".