856125965 has 16 divisors (see below), whose sum is σ = 1068951600. Its totient is φ = 657441792.

The previous prime is 856125953. The next prime is 856125973. The reversal of 856125965 is 569521658.

It can be written as a sum of positive squares in 8 ways, for example, as 797449 + 855328516 = 893^2 + 29246^2 .

It is a cyclic number.

It is not a de Polignac number, because 856125965 - 2¹² = 856121869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8021 + ... + 42149.

It is an arithmetic number, because the mean of its divisors is an integer number (66809475).

Almost surely, 2^856125965 is an apocalyptic number.

It is an amenable number.

856125965 is a deficient number, since it is larger than the sum of its proper divisors (212825635).

856125965 is a wasteful number, since it uses less digits than its factorization.

856125965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34336.

The product of its digits is 648000, while the sum is 47.

The square root of 856125965 is about 29259.6302949986. The cubic root of 856125965 is about 949.5384516978.

It can be divided in two parts, 85 and 6125965, that multiplied together give a palindrome (520707025).

The spelling of 856125965 in words is "eight hundred fifty-six million, one hundred twenty-five thousand, nine hundred sixty-five".