71062081 has 4 divisors (see below), whose sum is σ = 71089200. Its totient is φ = 71034964.

The previous prime is 71062067. The next prime is 71062099. The reversal of 71062081 is 18026017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18026017 = 199 ⋅90583.

It is a cyclic number.

It is not a de Polignac number, because 71062081 - 2⁷ = 71061953 is a prime.

It is a super-2 number, since 2×71062081² = 10099638712101122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71062051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9151 + ... + 15028.

It is an arithmetic number, because the mean of its divisors is an integer number (17772300).

Almost surely, 2^71062081 is an apocalyptic number.

It is an amenable number.

71062081 is a deficient number, since it is larger than the sum of its proper divisors (27119).

71062081 is a wasteful number, since it uses less digits than its factorization.

71062081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27118.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 71062081 is about 8429.8327978673. The cubic root of 71062081 is about 414.2024280965.

Adding to 71062081 its reverse (18026017), we get a palindrome (89088098).

The spelling of 71062081 in words is "seventy-one million, sixty-two thousand, eighty-one".