71564041 has 4 divisors (see below), whose sum is σ = 72737284. Its totient is φ = 70390800.

The previous prime is 71564029. The next prime is 71564081. The reversal of 71564041 is 14046517.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1071225 + 70492816 = 1035^2 + 8396^2 .

It is a cyclic number.

It is not a de Polignac number, because 71564041 - 2⁹ = 71563529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71564081) 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 3 ways as a sum of consecutive naturals, for example, 586530 + ... + 586651.

It is an arithmetic number, because the mean of its divisors is an integer number (18184321).

Almost surely, 2^71564041 is an apocalyptic number.

It is an amenable number.

71564041 is a deficient number, since it is larger than the sum of its proper divisors (1173243).

71564041 is a wasteful number, since it uses less digits than its factorization.

71564041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173242.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 71564041 is about 8459.5532387946. The cubic root of 71564041 is about 415.1754056022.

The spelling of 71564041 in words is "seventy-one million, five hundred sixty-four thousand, forty-one".