71271986 has 8 divisors (see below), whose sum is σ = 111556224. Its totient is φ = 34086580.

The previous prime is 71271979. The next prime is 71272013. The reversal of 71271986 is 68917217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 774650 + ... + 774741.

It is an arithmetic number, because the mean of its divisors is an integer number (13944528).

Almost surely, 2^71271986 is an apocalyptic number.

71271986 is a deficient number, since it is larger than the sum of its proper divisors (40284238).

71271986 is a wasteful number, since it uses less digits than its factorization.

71271986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1549416.

The product of its digits is 42336, while the sum is 41.

The square root of 71271986 is about 8442.2737458578. The cubic root of 71271986 is about 414.6098544608.

The spelling of 71271986 in words is "seventy-one million, two hundred seventy-one thousand, nine hundred eighty-six".