71071081 has 8 divisors (see below), whose sum is σ = 75970944. Its totient is φ = 66322080.

The previous prime is 71071069. The next prime is 71071087. The reversal of 71071081 is 18017017.

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

It is a cyclic number.

It is not a de Polignac number, because 71071081 - 2⁷ = 71070953 is a prime.

It is a super-2 number, since 2×71071081² = 10102197109017122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71071087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36741 + ... + 38626.

It is an arithmetic number, because the mean of its divisors is an integer number (9496368).

Almost surely, 2^71071081 is an apocalyptic number.

It is an amenable number.

71071081 is a deficient number, since it is larger than the sum of its proper divisors (4899863).

71071081 is a wasteful number, since it uses less digits than its factorization.

71071081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75431.

The product of its (nonzero) digits is 392, while the sum is 25.

The square root of 71071081 is about 8430.3665993834. The cubic root of 71071081 is about 414.2199135798.

Adding to 71071081 its reverse (18017017), we get a palindrome (89088098).

The spelling of 71071081 in words is "seventy-one million, seventy-one thousand, eighty-one".