101265865 has 4 divisors (see below), whose sum is σ = 121519044. Its totient is φ = 81012688.

The previous prime is 101265847. The next prime is 101265887. The reversal of 101265865 is 568562101.

It is a happy number.

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 63664441 + 37601424 = 7979^2 + 6132^2 .

It is a cyclic number.

It is not a de Polignac number, because 101265865 - 2⁵ = 101265833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101265865.

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, 10126582 + ... + 10126591.

It is an arithmetic number, because the mean of its divisors is an integer number (30379761).

Almost surely, 2^101265865 is an apocalyptic number.

It is an amenable number.

101265865 is a deficient number, since it is larger than the sum of its proper divisors (20253179).

101265865 is an equidigital number, since it uses as much as digits as its factorization.

101265865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20253178.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 101265865 is about 10063.0942060581. The cubic root of 101265865 is about 466.1092184458.

The spelling of 101265865 in words is "one hundred one million, two hundred sixty-five thousand, eight hundred sixty-five".