71543942 has 16 divisors (see below), whose sum is σ = 109392720. Its totient is φ = 35085312.

The previous prime is 71543891. The next prime is 71543971. The reversal of 71543942 is 24934517.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 26909 + ... + 29447.

It is an arithmetic number, because the mean of its divisors is an integer number (6837045).

Almost surely, 2^71543942 is an apocalyptic number.

71543942 is a deficient number, since it is larger than the sum of its proper divisors (37848778).

71543942 is a wasteful number, since it uses less digits than its factorization.

71543942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807.

The product of its digits is 30240, while the sum is 35.

The square root of 71543942 is about 8458.3652084785. The cubic root of 71543942 is about 415.1365341630.

The spelling of 71543942 in words is "seventy-one million, five hundred forty-three thousand, nine hundred forty-two".