6864557 has 12 divisors (see below), whose sum is σ = 8333856. Its totient is φ = 5627160.

The previous prime is 6864553. The next prime is 6864581. The reversal of 6864557 is 7554686.

It is not a de Polignac number, because 6864557 - 2² = 6864553 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 (6864553) 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, 1919 + ... + 4172.

It is an arithmetic number, because the mean of its divisors is an integer number (694488).

Almost surely, 2^6864557 is an apocalyptic number.

It is an amenable number.

6864557 is a deficient number, since it is larger than the sum of its proper divisors (1469299).

6864557 is a wasteful number, since it uses less digits than its factorization.

6864557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6128 (or 6121 counting only the distinct ones).

The product of its digits is 201600, while the sum is 41.

The square root of 6864557 is about 2620.0299616607. The cubic root of 6864557 is about 190.0512973219.

The spelling of 6864557 in words is "six million, eight hundred sixty-four thousand, five hundred fifty-seven".