42870071 has 4 divisors (see below), whose sum is σ = 42966000. Its totient is φ = 42774144.

The previous prime is 42870067. The next prime is 42870089. The reversal of 42870071 is 17007824.

42870071 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 42870071 - 2² = 42870067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42870041) 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, 47291 + ... + 48188.

It is an arithmetic number, because the mean of its divisors is an integer number (10741500).

Almost surely, 2^42870071 is an apocalyptic number.

42870071 is a deficient number, since it is larger than the sum of its proper divisors (95929).

42870071 is an equidigital number, since it uses as much as digits as its factorization.

42870071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95928.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 42870071 is about 6547.5240358474. The cubic root of 42870071 is about 349.9865872411.

Adding to 42870071 its reverse (17007824), we get a palindrome (59877895).

The spelling of 42870071 in words is "forty-two million, eight hundred seventy thousand, seventy-one".