71540745 has 32 divisors (see below), whose sum is σ = 117244800. Its totient is φ = 37238784.

The previous prime is 71540723. The next prime is 71540759. The reversal of 71540745 is 54704517.

It is not a de Polignac number, because 71540745 - 2¹⁸ = 71278601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202489 + ... + 202841.

It is an arithmetic number, because the mean of its divisors is an integer number (3663900).

Almost surely, 2^71540745 is an apocalyptic number.

It is an amenable number.

71540745 is a deficient number, since it is larger than the sum of its proper divisors (45704055).

71540745 is a wasteful number, since it uses less digits than its factorization.

71540745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649.

The product of its (nonzero) digits is 19600, while the sum is 33.

The square root of 71540745 is about 8458.1762218578. The cubic root of 71540745 is about 415.1303504982.

The spelling of 71540745 in words is "seventy-one million, five hundred forty thousand, seven hundred forty-five".