71043442 has 16 divisors (see below), whose sum is σ = 113560920. Its totient is φ = 33216768.

The previous prime is 71043437. The next prime is 71043443. The reversal of 71043442 is 24434017.

It can be written as a sum of positive squares in 4 ways, for example, as 41460721 + 29582721 = 6439^2 + 5439^2 .

It is not an unprimeable number, because it can be changed into a prime (71043443) 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 7 ways as a sum of consecutive naturals, for example, 1317 + ... + 11992.

Almost surely, 2^71043442 is an apocalyptic number.

71043442 is a deficient number, since it is larger than the sum of its proper divisors (42517478).

71043442 is a wasteful number, since it uses less digits than its factorization.

71043442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13485.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 71043442 is about 8428.7271874228. The cubic root of 71043442 is about 414.1662109653.

Adding to 71043442 its reverse (24434017), we get a palindrome (95477459).

The spelling of 71043442 in words is "seventy-one million, forty-three thousand, four hundred forty-two".