71029985 has 16 divisors (see below), whose sum is σ = 92245440. Its totient is φ = 52194240.

The previous prime is 71029901. The next prime is 71029991. The reversal of 71029985 is 58992017.

It is not a de Polignac number, because 71029985 - 2²⁰ = 69981409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11126 + ... + 16304.

It is an arithmetic number, because the mean of its divisors is an integer number (5765340).

Almost surely, 2^71029985 is an apocalyptic number.

It is an amenable number.

71029985 is a deficient number, since it is larger than the sum of its proper divisors (21215455).

71029985 is a wasteful number, since it uses less digits than its factorization.

71029985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5408.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 71029985 is about 8427.9288677587. The cubic root of 71029985 is about 414.1400589542.

The spelling of 71029985 in words is "seventy-one million, twenty-nine thousand, nine hundred eighty-five".