71358565 has 4 divisors (see below), whose sum is σ = 85630284. Its totient is φ = 57086848.

The previous prime is 71358563. The next prime is 71358577. The reversal of 71358565 is 56585317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56585317 = 1949 ⋅29033.

It can be written as a sum of positive squares in 2 ways, for example, as 44328964 + 27029601 = 6658^2 + 5199^2 .

It is a cyclic number.

It is not a de Polignac number, because 71358565 - 2¹ = 71358563 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71358563) 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, 7135852 + ... + 7135861.

It is an arithmetic number, because the mean of its divisors is an integer number (21407571).

Almost surely, 2^71358565 is an apocalyptic number.

It is an amenable number.

71358565 is a deficient number, since it is larger than the sum of its proper divisors (14271719).

71358565 is a wasteful number, since it uses less digits than its factorization.

71358565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14271718.

The product of its digits is 126000, while the sum is 40.

The square root of 71358565 is about 8447.3998958259. The cubic root of 71358565 is about 414.7776715938. Note that the first 3 decimals are identical.

The spelling of 71358565 in words is "seventy-one million, three hundred fifty-eight thousand, five hundred sixty-five".