71070042 has 32 divisors (see below), whose sum is σ = 148137984. Its totient is φ = 22705200.

The previous prime is 71070029. The next prime is 71070061. The reversal of 71070042 is 24007017.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 18117 + ... + 21687.

It is an arithmetic number, because the mean of its divisors is an integer number (4629312).

Almost surely, 2^71070042 is an apocalyptic number.

71070042 is an abundant number, since it is smaller than the sum of its proper divisors (77067942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71070042 is a wasteful number, since it uses less digits than its factorization.

71070042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3714.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 71070042 is about 8430.3049766898. The cubic root of 71070042 is about 414.2178950533.

Adding to 71070042 its reverse (24007017), we get a palindrome (95077059).

The spelling of 71070042 in words is "seventy-one million, seventy thousand, forty-two".