42538739 has 8 divisors (see below), whose sum is σ = 45819840. Its totient is φ = 39361896.

The previous prime is 42538729. The next prime is 42538747. The reversal of 42538739 is 93783524.

42538739 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 a cyclic number.

It is not a de Polignac number, because 42538739 - 2⁴ = 42538723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42538696 and 42538705.

It is not an unprimeable number, because it can be changed into a prime (42538729) 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, 25217 + ... + 26850.

It is an arithmetic number, because the mean of its divisors is an integer number (5727480).

Almost surely, 2^42538739 is an apocalyptic number.

42538739 is a deficient number, since it is larger than the sum of its proper divisors (3281101).

42538739 is a wasteful number, since it uses less digits than its factorization.

42538739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52129.

The product of its digits is 181440, while the sum is 41.

The square root of 42538739 is about 6522.1728741271. The cubic root of 42538739 is about 349.0826015543.

The spelling of 42538739 in words is "forty-two million, five hundred thirty-eight thousand, seven hundred thirty-nine".