71061081 has 32 divisors (see below), whose sum is σ = 117562368. Its totient is φ = 37177920.

The previous prime is 71061079. The next prime is 71061091. The reversal of 71061081 is 18016017.

71061081 is a nontrivial binomial coefficient, being equal to C(11922, 2).

It is not a de Polignac number, because 71061081 - 2¹ = 71061079 is a prime.

It is a super-2 number, since 2×71061081² = 10099354465777122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71061041) 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 31 ways as a sum of consecutive naturals, for example, 34770 + ... + 36756.

It is an arithmetic number, because the mean of its divisors is an integer number (3673824).

Almost surely, 2^71061081 is an apocalyptic number.

71061081 is the 11921-st triangular number and also the 5961-st hexagonal number.

It is an amenable number.

71061081 is a deficient number, since it is larger than the sum of its proper divisors (46501287).

71061081 is a wasteful number, since it uses less digits than its factorization.

71061081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141.

The product of its (nonzero) digits is 336, while the sum is 24.

The square root of 71061081 is about 8429.7734845012. The cubic root of 71061081 is about 414.2004851739.

Adding to 71061081 its reverse (18016017), we get a palindrome (89077098).

The spelling of 71061081 in words is "seventy-one million, sixty-one thousand, eighty-one".