868557 has 8 divisors (see below), whose sum is σ = 1185184. Its totient is φ = 565488.

The previous prime is 868537. The next prime is 868559. The reversal of 868557 is 755868.

It is a happy number.

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

It is not a de Polignac number, because 868557 - 2⁶ = 868493 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3238 + ... + 3495.

It is an arithmetic number, because the mean of its divisors is an integer number (148148).

2⁸⁶⁸⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

868557 is a deficient number, since it is larger than the sum of its proper divisors (316627).

868557 is a wasteful number, since it uses less digits than its factorization.

868557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6779.

The product of its digits is 67200, while the sum is 39.

The square root of 868557 is about 931.9640551008. The cubic root of 868557 is about 95.4112183495.

The spelling of 868557 in words is "eight hundred sixty-eight thousand, five hundred fifty-seven".