71082861 has 16 divisors (see below), whose sum is σ = 96507264. Its totient is φ = 46531584.

The previous prime is 71082853. The next prime is 71082871. The reversal of 71082861 is 16828017.

It is a happy number.

It is not a de Polignac number, because 71082861 - 2³ = 71082853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71082821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38976 + ... + 40758.

It is an arithmetic number, because the mean of its divisors is an integer number (6031704).

Almost surely, 2^71082861 is an apocalyptic number.

It is an amenable number.

71082861 is a deficient number, since it is larger than the sum of its proper divisors (25424403).

71082861 is a wasteful number, since it uses less digits than its factorization.

71082861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 71082861 is about 8431.0652351883. The cubic root of 71082861 is about 414.2427979042.

The spelling of 71082861 in words is "seventy-one million, eighty-two thousand, eight hundred sixty-one".