71071445 has 4 divisors (see below), whose sum is σ = 85285740. Its totient is φ = 56857152.

The previous prime is 71071439. The next prime is 71071447. The reversal of 71071445 is 54417017.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9746884 + 61324561 = 3122^2 + 7831^2 .

It is a cyclic number.

It is not a de Polignac number, because 71071445 - 2²² = 66877141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71071447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7107140 + ... + 7107149.

It is an arithmetic number, because the mean of its divisors is an integer number (21321435).

Almost surely, 2^71071445 is an apocalyptic number.

It is an amenable number.

71071445 is a deficient number, since it is larger than the sum of its proper divisors (14214295).

71071445 is a wasteful number, since it uses less digits than its factorization.

71071445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14214294.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 71071445 is about 8430.3881879781. The cubic root of 71071445 is about 414.2206207394.

The spelling of 71071445 in words is "seventy-one million, seventy-one thousand, four hundred forty-five".