71370865 has 4 divisors (see below), whose sum is σ = 85645044. Its totient is φ = 57096688.

The previous prime is 71370853. The next prime is 71370869. The reversal of 71370865 is 56807317.

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 11029041 + 60341824 = 3321^2 + 7768^2 .

It is a cyclic number.

It is not a de Polignac number, because 71370865 - 2⁷ = 71370737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71370869) 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, 7137082 + ... + 7137091.

It is an arithmetic number, because the mean of its divisors is an integer number (21411261).

Almost surely, 2^71370865 is an apocalyptic number.

It is an amenable number.

71370865 is a deficient number, since it is larger than the sum of its proper divisors (14274179).

71370865 is a wasteful number, since it uses less digits than its factorization.

71370865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14274178.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 71370865 is about 8448.1278991265. The cubic root of 71370865 is about 414.8015018201.

The spelling of 71370865 in words is "seventy-one million, three hundred seventy thousand, eight hundred sixty-five".