71027081 has 2 divisors, whose sum is σ = 71027082. Its totient is φ = 71027080.

The previous prime is 71027041. The next prime is 71027093. The reversal of 71027081 is 18072017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70829056 + 198025 = 8416^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 71027081 - 2⁶ = 71027017 is a prime.

It is a super-2 number, since 2×71027081² = 10089692470761122, which contains 22 as substring.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 71027081.

It is not a weakly prime, because it can be changed into another prime (71027041) 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 as a sum of consecutive naturals, namely, 35513540 + 35513541.

It is an arithmetic number, because the mean of its divisors is an integer number (35513541).

Almost surely, 2^71027081 is an apocalyptic number.

It is an amenable number.

71027081 is a deficient number, since it is larger than the sum of its proper divisors (1).

71027081 is an equidigital number, since it uses as much as digits as its factorization.

71027081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 71027081 is about 8427.7565816770. The cubic root of 71027081 is about 414.1344149570.

Adding to 71027081 its reverse (18072017), we get a palindrome (89099098).

The spelling of 71027081 in words is "seventy-one million, twenty-seven thousand, eighty-one".