865345 has 8 divisors (see below), whose sum is σ = 1118376. Its totient is φ = 638976.

The previous prime is 865343. The next prime is 865349. The reversal of 865345 is 543568.

865345 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 4 ways, for example, as 2304 + 863041 = 48^2 + 929^2 .

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

It is not a de Polignac number, because 865345 - 2¹ = 865343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (865343) 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, 6592 + ... + 6721.

It is an arithmetic number, because the mean of its divisors is an integer number (139797).

2⁸⁶⁵³⁴⁵ is an apocalyptic number.

It is an amenable number.

865345 is a deficient number, since it is larger than the sum of its proper divisors (253031).

865345 is a wasteful number, since it uses less digits than its factorization.

865345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13331.

The product of its digits is 14400, while the sum is 31.

The square root of 865345 is about 930.2392165459. The cubic root of 865345 is about 95.2934600506.

The spelling of 865345 in words is "eight hundred sixty-five thousand, three hundred forty-five".