6418861 has 4 divisors (see below), whose sum is σ = 6465852. Its totient is φ = 6371872.

The previous prime is 6418813. The next prime is 6418873. The reversal of 6418861 is 1688146.

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 2996361 + 3422500 = 1731^2 + 1850^2 .

It is a cyclic number.

It is not a de Polignac number, because 6418861 - 2⁷ = 6418733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6418261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23290 + ... + 23563.

It is an arithmetic number, because the mean of its divisors is an integer number (1616463).

Almost surely, 2^6418861 is an apocalyptic number.

It is an amenable number.

6418861 is a deficient number, since it is larger than the sum of its proper divisors (46991).

6418861 is a wasteful number, since it uses less digits than its factorization.

6418861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46990.

The product of its digits is 9216, while the sum is 34.

The square root of 6418861 is about 2533.5471181725. The cubic root of 6418861 is about 185.8457599033.

The spelling of 6418861 in words is "six million, four hundred eighteen thousand, eight hundred sixty-one".