865625105 has 4 divisors (see below), whose sum is σ = 1038750132. Its totient is φ = 692500080.

The previous prime is 865625099. The next prime is 865625143. The reversal of 865625105 is 501526568.

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 406465921 + 459159184 = 20161^2 + 21428^2 .

It is not a de Polignac number, because 865625105 - 2²⁰ = 864576529 is a prime.

It is a super-2 number, since 2×865625105² = 1498613644812522050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86562506 + ... + 86562515.

It is an arithmetic number, because the mean of its divisors is an integer number (259687533).

Almost surely, 2^865625105 is an apocalyptic number.

It is an amenable number.

865625105 is a deficient number, since it is larger than the sum of its proper divisors (173125027).

865625105 is a wasteful number, since it uses less digits than its factorization.

865625105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173125026.

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 865625105 is about 29421.5075242585. The cubic root of 865625105 is about 953.0374084229.

The spelling of 865625105 in words is "eight hundred sixty-five million, six hundred twenty-five thousand, one hundred five".