102000865 has 4 divisors (see below), whose sum is σ = 122401044. Its totient is φ = 81600688.

The previous prime is 102000851. The next prime is 102000931. The reversal of 102000865 is 568000201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568000201 = 43 ⋅13209307.

It can be written as a sum of positive squares in 2 ways, for example, as 25280784 + 76720081 = 5028^2 + 8759^2 .

It is a cyclic number.

It is not a de Polignac number, because 102000865 - 2¹¹ = 101998817 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10200082 + ... + 10200091.

It is an arithmetic number, because the mean of its divisors is an integer number (30600261).

Almost surely, 2^102000865 is an apocalyptic number.

It is an amenable number.

102000865 is a deficient number, since it is larger than the sum of its proper divisors (20400179).

102000865 is an equidigital number, since it uses as much as digits as its factorization.

102000865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20400178.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 102000865 is about 10099.5477621525. The cubic root of 102000865 is about 467.2341936045.

The spelling of 102000865 in words is "one hundred two million, eight hundred sixty-five", and thus it is an aban number.