42071047 has 4 divisors (see below), whose sum is σ = 42110496. Its totient is φ = 42031600.

The previous prime is 42071041. The next prime is 42071053. The reversal of 42071047 is 74017024.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (42071041) and next prime (42071053).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42071047 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 (42071041) 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, 18079 + ... + 20272.

It is an arithmetic number, because the mean of its divisors is an integer number (10527624).

Almost surely, 2^42071047 is an apocalyptic number.

42071047 is a deficient number, since it is larger than the sum of its proper divisors (39449).

42071047 is a wasteful number, since it uses less digits than its factorization.

42071047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39448.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 42071047 is about 6486.2197773433. The cubic root of 42071047 is about 347.7985550783.

The spelling of 42071047 in words is "forty-two million, seventy-one thousand, forty-seven".