71171020 has 24 divisors (see below), whose sum is σ = 152936784. Its totient is φ = 27806016.

The previous prime is 71170999. The next prime is 71171029. The reversal of 71171020 is 2017117.

It is not an unprimeable number, because it can be changed into a prime (71171029) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 40519 + ... + 42238.

It is an arithmetic number, because the mean of its divisors is an integer number (6372366).

Almost surely, 2^71171020 is an apocalyptic number.

It is an amenable number.

71171020 is an abundant number, since it is smaller than the sum of its proper divisors (81765764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71171020 is a wasteful number, since it uses less digits than its factorization.

71171020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82809 (or 82807 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 19.

The square root of 71171020 is about 8436.2918394280. The cubic root of 71171020 is about 414.4139790830.

Adding to 71171020 its reverse (2017117), we get a palindrome (73188137).

The spelling of 71171020 in words is "seventy-one million, one hundred seventy-one thousand, twenty".