6864642 has 16 divisors (see below), whose sum is σ = 15254880. Its totient is φ = 2288196.

The previous prime is 6864631. The next prime is 6864653. The reversal of 6864642 is 2464686.

It is a happy number.

6864642 is a `hidden beast` number, since 6 + 8 + 6 + 4 + 642 = 666.

It is an interprime number because it is at equal distance from previous prime (6864631) and next prime (6864653).

It is an Ulam number.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 6864597 and 6864606.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 63508 + ... + 63615.

It is an arithmetic number, because the mean of its divisors is an integer number (953430).

Almost surely, 2^6864642 is an apocalyptic number.

6864642 is an abundant number, since it is smaller than the sum of its proper divisors (8390238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6864642 is a wasteful number, since it uses less digits than its factorization.

6864642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127134 (or 127128 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 6864642 is about 2620.0461827991. The cubic root of 6864642 is about 190.0520817519.

The spelling of 6864642 in words is "six million, eight hundred sixty-four thousand, six hundred forty-two".