864549 has 12 divisors (see below), whose sum is σ = 1427296. Its totient is φ = 493992.

The previous prime is 864541. The next prime is 864551. The reversal of 864549 is 945468.

864549 is a `hidden beast` number, since 8 + 645 + 4 + 9 = 666.

It is not a de Polignac number, because 864549 - 2³ = 864541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6799 + ... + 6924.

2⁸⁶⁴⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

864549 is a deficient number, since it is larger than the sum of its proper divisors (562747).

864549 is a wasteful number, since it uses less digits than its factorization.

864549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13736 (or 13733 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 864549 is about 929.8112711728. The cubic root of 864549 is about 95.2642320685.

The spelling of 864549 in words is "eight hundred sixty-four thousand, five hundred forty-nine".