71545243 has 24 divisors (see below), whose sum is σ = 91625904. Its totient is φ = 55698720.

The previous prime is 71545237. The next prime is 71545261. The reversal of 71545243 is 34254517.

It is not a de Polignac number, because 71545243 - 2⁹ = 71544731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71545223) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 64671 + ... + 65767.

It is an arithmetic number, because the mean of its divisors is an integer number (3817746).

Almost surely, 2^71545243 is an apocalyptic number.

71545243 is a deficient number, since it is larger than the sum of its proper divisors (20080661).

71545243 is a wasteful number, since it uses less digits than its factorization.

71545243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144 (or 1115 counting only the distinct ones).

The product of its digits is 16800, while the sum is 31.

The square root of 71545243 is about 8458.4421142430. The cubic root of 71545243 is about 415.1390505157.

The spelling of 71545243 in words is "seventy-one million, five hundred forty-five thousand, two hundred forty-three".