865485 has 20 divisors (see below), whose sum is σ = 1552188. Its totient is φ = 461376.

The previous prime is 865483. The next prime is 865493. The reversal of 865485 is 584568.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 149769 + 715716 = 387^2 + 846^2 .

It is not a de Polignac number, because 865485 - 2¹ = 865483 is a prime.

865485 is a lucky number.

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 in 19 ways as a sum of consecutive naturals, for example, 664 + ... + 1473.

2⁸⁶⁵⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

865485 is a deficient number, since it is larger than the sum of its proper divisors (686703).

865485 is a wasteful number, since it uses less digits than its factorization.

865485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2154 (or 2145 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 865485 is about 930.3144629640. The cubic root of 865485 is about 95.2985987968.

The spelling of 865485 in words is "eight hundred sixty-five thousand, four hundred eighty-five".