71270985 has 16 divisors (see below), whose sum is σ = 114145920. Its totient is φ = 37973760.

The previous prime is 71270981. The next prime is 71271001. The reversal of 71270985 is 58907217.

It is not a de Polignac number, because 71270985 - 2² = 71270981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71270981) 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, 20740 + ... + 23930.

It is an arithmetic number, because the mean of its divisors is an integer number (7134120).

Almost surely, 2^71270985 is an apocalyptic number.

It is an amenable number.

71270985 is a deficient number, since it is larger than the sum of its proper divisors (42874935).

71270985 is a wasteful number, since it uses less digits than its factorization.

71270985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4688.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 71270985 is about 8442.2144606732. The cubic root of 71270985 is about 414.6079134157.

The spelling of 71270985 in words is "seventy-one million, two hundred seventy thousand, nine hundred eighty-five".