42129771 has 8 divisors (see below), whose sum is σ = 56286720. Its totient is φ = 28029672.

The previous prime is 42129751. The next prime is 42129793. The reversal of 42129771 is 17792124.

42129771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42129771 - 2⁵ = 42129739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42129701) 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, 12451 + ... + 15468.

It is an arithmetic number, because the mean of its divisors is an integer number (7035840).

Almost surely, 2^42129771 is an apocalyptic number.

42129771 is a deficient number, since it is larger than the sum of its proper divisors (14156949).

42129771 is a wasteful number, since it uses less digits than its factorization.

42129771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28425.

The product of its digits is 7056, while the sum is 33.

The square root of 42129771 is about 6490.7450265744. The cubic root of 42129771 is about 347.9603023154.

The spelling of 42129771 in words is "forty-two million, one hundred twenty-nine thousand, seven hundred seventy-one".