71540785 has 8 divisors (see below), whose sum is σ = 85896576. Its totient is φ = 57200880.

The previous prime is 71540779. The next prime is 71540797. The reversal of 71540785 is 58704517.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-71540785 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11250 + ... + 16420.

It is an arithmetic number, because the mean of its divisors is an integer number (10737072).

Almost surely, 2^71540785 is an apocalyptic number.

It is an amenable number.

71540785 is a deficient number, since it is larger than the sum of its proper divisors (14355791).

71540785 is a wasteful number, since it uses less digits than its factorization.

71540785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7943.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 71540785 is about 8458.1785864334. The cubic root of 71540785 is about 415.1304278677.

The spelling of 71540785 in words is "seventy-one million, five hundred forty thousand, seven hundred eighty-five".