71161105 has 4 divisors (see below), whose sum is σ = 85393332. Its totient is φ = 56928880.

The previous prime is 71161091. The next prime is 71161109. The reversal of 71161105 is 50116117.

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 54774801 + 16386304 = 7401^2 + 4048^2 .

It is a de Polignac number, because none of the positive numbers 2^k-71161105 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71161109) 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, 7116106 + ... + 7116115.

It is an arithmetic number, because the mean of its divisors is an integer number (21348333).

Almost surely, 2^71161105 is an apocalyptic number.

It is an amenable number.

71161105 is a deficient number, since it is larger than the sum of its proper divisors (14232227).

71161105 is a wasteful number, since it uses less digits than its factorization.

71161105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14232226.

The product of its (nonzero) digits is 210, while the sum is 22.

The square root of 71161105 is about 8435.7041792609. The cubic root of 71161105 is about 414.3947338648.

It can be divided in two parts, 711 and 61105, that added together give a palindrome (61816).

The spelling of 71161105 in words is "seventy-one million, one hundred sixty-one thousand, one hundred five".