71447542 has 16 divisors (see below), whose sum is σ = 108236160. Its totient is φ = 35371008.

The previous prime is 71447539. The next prime is 71447557. The reversal of 71447542 is 24574417.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 71447498 and 71447507.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 117403 + ... + 118009.

It is an arithmetic number, because the mean of its divisors is an integer number (6764760).

Almost surely, 2^71447542 is an apocalyptic number.

71447542 is a deficient number, since it is larger than the sum of its proper divisors (36788618).

71447542 is a wasteful number, since it uses less digits than its factorization.

71447542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095.

The product of its digits is 31360, while the sum is 34.

The square root of 71447542 is about 8452.6647869178. The cubic root of 71447542 is about 414.9499954266.

The spelling of 71447542 in words is "seventy-one million, four hundred forty-seven thousand, five hundred forty-two".