71170745 has 4 divisors (see below), whose sum is σ = 85404900. Its totient is φ = 56936592.

The previous prime is 71170739. The next prime is 71170783. The reversal of 71170745 is 54707117.

It is a happy number.

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 15578809 + 55591936 = 3947^2 + 7456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71170745 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7117070 + ... + 7117079.

It is an arithmetic number, because the mean of its divisors is an integer number (21351225).

Almost surely, 2^71170745 is an apocalyptic number.

It is an amenable number.

71170745 is a deficient number, since it is larger than the sum of its proper divisors (14234155).

71170745 is a wasteful number, since it uses less digits than its factorization.

71170745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14234154.

The product of its (nonzero) digits is 6860, while the sum is 32.

The square root of 71170745 is about 8436.2755407822. The cubic root of 71170745 is about 414.4134453265.

The spelling of 71170745 in words is "seventy-one million, one hundred seventy thousand, seven hundred forty-five".