865441 has 4 divisors (see below), whose sum is σ = 875952. Its totient is φ = 854932.

The previous prime is 865409. The next prime is 865457. The reversal of 865441 is 144568.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 865441 - 2⁵ = 865409 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (865481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5131 + ... + 5296.

It is an arithmetic number, because the mean of its divisors is an integer number (218988).

2⁸⁶⁵⁴⁴¹ is an apocalyptic number.

It is an amenable number.

865441 is a deficient number, since it is larger than the sum of its proper divisors (10511).

865441 is a wasteful number, since it uses less digits than its factorization.

865441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10510.

The product of its digits is 3840, while the sum is 28.

The square root of 865441 is about 930.2908147456. The cubic root of 865441 is about 95.2969838220.

The spelling of 865441 in words is "eight hundred sixty-five thousand, four hundred forty-one".