7041256865 has 4 divisors (see below), whose sum is σ = 8449508244. Its totient is φ = 5633005488.

The previous prime is 7041256861. The next prime is 7041256867. The reversal of 7041256865 is 5686521407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5686521407 = 7 ⋅812360201.

It can be written as a sum of positive squares in 2 ways, for example, as 856849984 + 6184406881 = 29272^2 + 78641^2 .

It is a cyclic number.

It is not a de Polignac number, because 7041256865 - 2² = 7041256861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7041256861) 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, 704125682 + ... + 704125691.

It is an arithmetic number, because the mean of its divisors is an integer number (2112377061).

Almost surely, 2^7041256865 is an apocalyptic number.

It is an amenable number.

7041256865 is a deficient number, since it is larger than the sum of its proper divisors (1408251379).

7041256865 is a wasteful number, since it uses less digits than its factorization.

7041256865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408251378.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 7041256865 is about 83912.1973553309. The cubic root of 7041256865 is about 1916.6819922488.

The spelling of 7041256865 in words is "seven billion, forty-one million, two hundred fifty-six thousand, eight hundred sixty-five".