71681132 has 12 divisors (see below), whose sum is σ = 125655600. Its totient is φ = 35779536.

The previous prime is 71681111. The next prime is 71681147. The reversal of 71681132 is 23118617.

It is a junction number, because it is equal to n+sod(n) for n = 71681095 and 71681104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12563 + ... + 17354.

It is an arithmetic number, because the mean of its divisors is an integer number (10471300).

Almost surely, 2^71681132 is an apocalyptic number.

It is an amenable number.

71681132 is a deficient number, since it is larger than the sum of its proper divisors (53974468).

71681132 is a wasteful number, since it uses less digits than its factorization.

71681132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30520 (or 30518 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

The square root of 71681132 is about 8466.4710476089. The cubic root of 71681132 is about 415.4017148566.

Adding to 71681132 its reverse (23118617), we get a palindrome (94799749).

The spelling of 71681132 in words is "seventy-one million, six hundred eighty-one thousand, one hundred thirty-two".