71026805 has 6 divisors (see below), whose sum is σ = 85254786. Its totient is φ = 56806368.

The previous prime is 71026793. The next prime is 71026811. The reversal of 71026805 is 50862017.

It can be written as a sum of positive squares in 3 ways, for example, as 28111204 + 42915601 = 5302^2 + 6551^2 .

It is a de Polignac number, because none of the positive numbers 2^k-71026805 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16961 + ... + 20729.

It is an arithmetic number, because the mean of its divisors is an integer number (14209131).

Almost surely, 2^71026805 is an apocalyptic number.

It is an amenable number.

71026805 is a deficient number, since it is larger than the sum of its proper divisors (14227981).

71026805 is an frugal number, since it uses more digits than its factorization.

71026805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7543 (or 3774 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 71026805 is about 8427.7402071967. The cubic root of 71026805 is about 414.1338785360.

The spelling of 71026805 in words is "seventy-one million, twenty-six thousand, eight hundred five".