71113845 has 32 divisors (see below), whose sum is σ = 128139264. Its totient is φ = 33364800.

The previous prime is 71113843. The next prime is 71113849. The reversal of 71113845 is 54831117.

It is not a de Polignac number, because 71113845 - 2¹ = 71113843 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71113841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1837 + ... + 12066.

It is an arithmetic number, because the mean of its divisors is an integer number (4004352).

Almost surely, 2^71113845 is an apocalyptic number.

It is an amenable number.

71113845 is a deficient number, since it is larger than the sum of its proper divisors (57025419).

71113845 is a wasteful number, since it uses less digits than its factorization.

71113845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13953.

The product of its digits is 3360, while the sum is 30.

The square root of 71113845 is about 8432.9025252282. The cubic root of 71113845 is about 414.3029766602.

The spelling of 71113845 in words is "seventy-one million, one hundred thirteen thousand, eight hundred forty-five".