71275865 has 16 divisors (see below), whose sum is σ = 86615568. Its totient is φ = 56303616.

The previous prime is 71275861. The next prime is 71275871. The reversal of 71275865 is 56857217.

It can be written as a sum of positive squares in 8 ways, for example, as 25321024 + 45954841 = 5032^2 + 6779^2 .

It is a cyclic number.

It is not a de Polignac number, because 71275865 - 2² = 71275861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71275861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 224687 + ... + 225003.

It is an arithmetic number, because the mean of its divisors is an integer number (5413473).

Almost surely, 2^71275865 is an apocalyptic number.

It is an amenable number.

71275865 is a deficient number, since it is larger than the sum of its proper divisors (15339703).

71275865 is a wasteful number, since it uses less digits than its factorization.

71275865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748.

The product of its digits is 117600, while the sum is 41.

The square root of 71275865 is about 8442.5034794189. The cubic root of 71275865 is about 414.6173760811.

The spelling of 71275865 in words is "seventy-one million, two hundred seventy-five thousand, eight hundred sixty-five".