71043845 has 4 divisors (see below), whose sum is σ = 85252620. Its totient is φ = 56835072.

The previous prime is 71043779. The next prime is 71043859. The reversal of 71043845 is 54834017.

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 31114084 + 39929761 = 5578^2 + 6319^2 .

It is a cyclic number.

It is not a de Polignac number, because 71043845 - 2¹⁶ = 70978309 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7104380 + ... + 7104389.

It is an arithmetic number, because the mean of its divisors is an integer number (21313155).

Almost surely, 2^71043845 is an apocalyptic number.

It is an amenable number.

71043845 is a deficient number, since it is larger than the sum of its proper divisors (14208775).

71043845 is a wasteful number, since it uses less digits than its factorization.

71043845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14208774.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 71043845 is about 8428.7510937268. The cubic root of 71043845 is about 414.1669940949.

The spelling of 71043845 in words is "seventy-one million, forty-three thousand, eight hundred forty-five".