865707825 has 24 divisors (see below), whose sum is σ = 1466218656. Its totient is φ = 450448000.

The previous prime is 865707809. The next prime is 865707827. The reversal of 865707825 is 528707568.

It is not a de Polignac number, because 865707825 - 2⁴ = 865707809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (865707827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137691 + ... + 143840.

It is an arithmetic number, because the mean of its divisors is an integer number (61092444).

Almost surely, 2^865707825 is an apocalyptic number.

It is an amenable number.

865707825 is a deficient number, since it is larger than the sum of its proper divisors (600510831).

865707825 is a wasteful number, since it uses less digits than its factorization.

865707825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281585 (or 281580 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 48.

The square root of 865707825 is about 29422.9132650049. The cubic root of 865707825 is about 953.0677651916.

It can be divided in two parts, 86570 and 7825, that added together give a triangular number (94395 = T₄₃₄).

The spelling of 865707825 in words is "eight hundred sixty-five million, seven hundred seven thousand, eight hundred twenty-five".