865486 has 4 divisors (see below), whose sum is σ = 1298232. Its totient is φ = 432742.

The previous prime is 865483. The next prime is 865493. The reversal of 865486 is 684568.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216370 + ... + 216373.

It is an arithmetic number, because the mean of its divisors is an integer number (324558).

2⁸⁶⁵⁴⁸⁶ is an apocalyptic number.

865486 is a deficient number, since it is larger than the sum of its proper divisors (432746).

865486 is a wasteful number, since it uses less digits than its factorization.

865486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432745.

The product of its digits is 46080, while the sum is 37.

The square root of 865486 is about 930.3150004165. The cubic root of 865486 is about 95.2986355001.

The spelling of 865486 in words is "eight hundred sixty-five thousand, four hundred eighty-six".