71021160 has 96 divisors (see below), whose sum is σ = 263802240. Its totient is φ = 16232832.

The previous prime is 71021131. The next prime is 71021161. The reversal of 71021160 is 6112017.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (71021161) 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 23 ways as a sum of consecutive naturals, for example, 11572 + ... + 16611.

It is an arithmetic number, because the mean of its divisors is an integer number (2747940).

Almost surely, 2^71021160 is an apocalyptic number.

71021160 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71021160 is an abundant number, since it is smaller than the sum of its proper divisors (192781080).

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

71021160 is a wasteful number, since it uses less digits than its factorization.

71021160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28207 (or 28200 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 71021160 is about 8427.4052946325. The cubic root of 71021160 is about 414.1229068675.

Adding to 71021160 its reverse (6112017), we get a palindrome (77133177).

The spelling of 71021160 in words is "seventy-one million, twenty-one thousand, one hundred sixty".