42129084 has 24 divisors (see below), whose sum is σ = 98472528. Its totient is φ = 14018560.

The previous prime is 42129053. The next prime is 42129091. The reversal of 42129084 is 48092124.

42129084 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 4954 + ... + 10430.

It is an arithmetic number, because the mean of its divisors is an integer number (4103022).

Almost surely, 2^42129084 is an apocalyptic number.

It is an amenable number.

42129084 is an abundant number, since it is smaller than the sum of its proper divisors (56343444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42129084 is a wasteful number, since it uses less digits than its factorization.

42129084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6125 (or 6123 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 42129084 is about 6490.6921048529. The cubic root of 42129084 is about 347.9584109369.

The spelling of 42129084 in words is "forty-two million, one hundred twenty-nine thousand, eighty-four".