6386861 has 4 divisors (see below), whose sum is σ = 6878172. Its totient is φ = 5895552.

The previous prime is 6386839. The next prime is 6386923. The reversal of 6386861 is 1686836.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1142761 + 5244100 = 1069^2 + 2290^2 .

It is not a de Polignac number, because 6386861 - 2¹⁴ = 6370477 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 (6386161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245636 + ... + 245661.

It is an arithmetic number, because the mean of its divisors is an integer number (1719543).

Almost surely, 2^6386861 is an apocalyptic number.

It is an amenable number.

6386861 is a deficient number, since it is larger than the sum of its proper divisors (491311).

6386861 is a wasteful number, since it uses less digits than its factorization.

6386861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491310.

The product of its digits is 41472, while the sum is 38.

The square root of 6386861 is about 2527.2239710797. The cubic root of 6386861 is about 185.5364124750.

The spelling of 6386861 in words is "six million, three hundred eighty-six thousand, eight hundred sixty-one".