865134257 has 8 divisors (see below), whose sum is σ = 933792384. Its totient is φ = 796777488.

The previous prime is 865134241. The next prime is 865134299. The reversal of 865134257 is 752431568.

865134257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 865134257 - 2⁴ = 865134241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (865131257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69353 + ... + 80870.

It is an arithmetic number, because the mean of its divisors is an integer number (116724048).

Almost surely, 2^865134257 is an apocalyptic number.

It is an amenable number.

865134257 is a deficient number, since it is larger than the sum of its proper divisors (68658127).

865134257 is a wasteful number, since it uses less digits than its factorization.

865134257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150679.

The product of its digits is 201600, while the sum is 41.

The square root of 865134257 is about 29413.1646886220. The cubic root of 865134257 is about 952.8572361399.

The spelling of 865134257 in words is "eight hundred sixty-five million, one hundred thirty-four thousand, two hundred fifty-seven".