71121543 has 16 divisors (see below), whose sum is σ = 102366720. Its totient is φ = 43787744.

The previous prime is 71121529. The next prime is 71121553. The reversal of 71121543 is 34512117.

It is a cyclic number.

It is not a de Polignac number, because 71121543 - 2⁸ = 71121287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71121553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15771 + ... + 19772.

It is an arithmetic number, because the mean of its divisors is an integer number (6397920).

Almost surely, 2^71121543 is an apocalyptic number.

71121543 is a deficient number, since it is larger than the sum of its proper divisors (31245177).

71121543 is a wasteful number, since it uses less digits than its factorization.

71121543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35598.

The product of its digits is 840, while the sum is 24.

The square root of 71121543 is about 8433.3589393551. The cubic root of 71121543 is about 414.3179254101.

The spelling of 71121543 in words is "seventy-one million, one hundred twenty-one thousand, five hundred forty-three".