42131679 has 4 divisors (see below), whose sum is σ = 56175576. Its totient is φ = 28087784.

The previous prime is 42131671. The next prime is 42131681. The reversal of 42131679 is 97613124.

42131679 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 is a cyclic number.

It is not a de Polignac number, because 42131679 - 2³ = 42131671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42131671) 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, 7021944 + ... + 7021949.

It is an arithmetic number, because the mean of its divisors is an integer number (14043894).

Almost surely, 2^42131679 is an apocalyptic number.

42131679 is a deficient number, since it is larger than the sum of its proper divisors (14043897).

42131679 is a wasteful number, since it uses less digits than its factorization.

42131679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14043896.

The product of its digits is 9072, while the sum is 33.

The square root of 42131679 is about 6490.8920034152. The cubic root of 42131679 is about 347.9655551190.

The spelling of 42131679 in words is "forty-two million, one hundred thirty-one thousand, six hundred seventy-nine".