42529181 has 4 divisors (see below), whose sum is σ = 42950364. Its totient is φ = 42108000.

The previous prime is 42529141. The next prime is 42529187. The reversal of 42529181 is 18192524.

42529181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30349081 + 12180100 = 5509^2 + 3490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42529181 is a prime.

It is a super-2 number, since 2×42529181² = 3617462473061522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42529187) 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 3 ways as a sum of consecutive naturals, for example, 210440 + ... + 210641.

It is an arithmetic number, because the mean of its divisors is an integer number (10737591).

Almost surely, 2^42529181 is an apocalyptic number.

It is an amenable number.

42529181 is a deficient number, since it is larger than the sum of its proper divisors (421183).

42529181 is a wasteful number, since it uses less digits than its factorization.

42529181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421182.

The product of its digits is 5760, while the sum is 32.

The square root of 42529181 is about 6521.4401016953. The cubic root of 42529181 is about 349.0564545527.

The spelling of 42529181 in words is "forty-two million, five hundred twenty-nine thousand, one hundred eighty-one".