71071161 has 32 divisors (see below), whose sum is σ = 111302400. Its totient is φ = 39502080.

The previous prime is 71071159. The next prime is 71071171. The reversal of 71071161 is 16117017.

It is not a de Polignac number, because 71071161 - 2¹ = 71071159 is a prime.

It is a super-2 number, since 2×71071161² = 10102219851775842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71071111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139375 + ... + 139883.

It is an arithmetic number, because the mean of its divisors is an integer number (3478200).

Almost surely, 2^71071161 is an apocalyptic number.

It is an amenable number.

71071161 is a deficient number, since it is larger than the sum of its proper divisors (40231239).

71071161 is a wasteful number, since it uses less digits than its factorization.

71071161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689.

The product of its (nonzero) digits is 294, while the sum is 24.

The square root of 71071161 is about 8430.3713441343. The cubic root of 71071161 is about 414.2200689997.

Adding to 71071161 its reverse (16117017), we get a palindrome (87188178).

The spelling of 71071161 in words is "seventy-one million, seventy-one thousand, one hundred sixty-one".