865125072 has 60 divisors (see below), whose sum is σ = 2767030240. Its totient is φ = 247178304.

The previous prime is 865125049. The next prime is 865125077. The reversal of 865125072 is 270521568.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865125077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 428122 + ... + 430137.

Almost surely, 2^865125072 is an apocalyptic number.

It is an amenable number.

865125072 is an abundant number, since it is smaller than the sum of its proper divisors (1901905168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865125072 is a wasteful number, since it uses less digits than its factorization.

865125072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858280 (or 858271 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 865125072 is about 29413.0085506396. The cubic root of 865125072 is about 952.8538640141.

The spelling of 865125072 in words is "eight hundred sixty-five million, one hundred twenty-five thousand, seventy-two".