864506 has 8 divisors (see below), whose sum is σ = 1301844. Its totient is φ = 430560.

The previous prime is 864503. The next prime is 864509. The reversal of 864506 is 605468.

It is an interprime number because it is at equal distance from previous prime (864503) and next prime (864509).

It can be written as a sum of positive squares in 2 ways, for example, as 748225 + 116281 = 865^2 + 341^2 .

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

It is not an unprimeable number, because it can be changed into a prime (864503) 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 3 ways as a sum of consecutive naturals, for example, 65 + ... + 1316.

2⁸⁶⁴⁵⁰⁶ is an apocalyptic number.

864506 is a deficient number, since it is larger than the sum of its proper divisors (437338).

864506 is a wasteful number, since it uses less digits than its factorization.

864506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 864506 is about 929.7881479133. The cubic root of 864506 is about 95.2626526593.

The spelling of 864506 in words is "eight hundred sixty-four thousand, five hundred six".