71281705 has 16 divisors (see below), whose sum is σ = 94094208. Its totient is φ = 51836400.

The previous prime is 71281687. The next prime is 71281783. The reversal of 71281705 is 50718217.

It is a happy number.

It is not a de Polignac number, because 71281705 - 2⁹ = 71281193 is a prime.

It is a Duffinian number.

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, 1300 + ... + 12010.

It is an arithmetic number, because the mean of its divisors is an integer number (5880888).

Almost surely, 2^71281705 is an apocalyptic number.

It is an amenable number.

71281705 is a deficient number, since it is larger than the sum of its proper divisors (22812503).

71281705 is a wasteful number, since it uses less digits than its factorization.

71281705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10749 (or 10727 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 71281705 is about 8442.8493413065. The cubic root of 71281705 is about 414.6286996867.

The spelling of 71281705 in words is "seventy-one million, two hundred eighty-one thousand, seven hundred five".