42080939 has 4 divisors (see below), whose sum is σ = 42125424. Its totient is φ = 42036456.

The previous prime is 42080921. The next prime is 42080947. The reversal of 42080939 is 93908024.

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 42080939 - 2⁸ = 42080683 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42080899 and 42080908.

It is not an unprimeable number, because it can be changed into a prime (42083939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20792 + ... + 22725.

It is an arithmetic number, because the mean of its divisors is an integer number (10531356).

Almost surely, 2^42080939 is an apocalyptic number.

42080939 is a deficient number, since it is larger than the sum of its proper divisors (44485).

42080939 is an equidigital number, since it uses as much as digits as its factorization.

42080939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44484.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 42080939 is about 6486.9822722126. The cubic root of 42080939 is about 347.8258117781.

The spelling of 42080939 in words is "forty-two million, eighty thousand, nine hundred thirty-nine".