71161000 has 32 divisors (see below), whose sum is σ = 166519080. Its totient is φ = 28464000.

The previous prime is 71160989. The next prime is 71161003. The reversal of 71161000 is 16117.

It can be written as a sum of positive squares in 4 ways, for example, as 28153636 + 43007364 = 5306^2 + 6558^2 .

It is not an unprimeable number, because it can be changed into a prime (71161003) 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 7 ways as a sum of consecutive naturals, for example, 34581 + ... + 36580.

Almost surely, 2^71161000 is an apocalyptic number.

It is an amenable number.

71161000 is an abundant number, since it is smaller than the sum of its proper divisors (95358080).

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

71161000 is a wasteful number, since it uses less digits than its factorization.

71161000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71182 (or 71168 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 16.

The square root of 71161000 is about 8435.6979557118. The cubic root of 71161000 is about 414.3945300481.

Adding to 71161000 its reverse (16117), we get a palindrome (71177117).

The spelling of 71161000 in words is "seventy-one million, one hundred sixty-one thousand".