6421118 has 8 divisors (see below), whose sum is σ = 10507320. Its totient is φ = 2918680.

The previous prime is 6421111. The next prime is 6421127. The reversal of 6421118 is 8111246.

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

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6421093 and 6421102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421111) 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, 145913 + ... + 145956.

It is an arithmetic number, because the mean of its divisors is an integer number (1313415).

Almost surely, 2^6421118 is an apocalyptic number.

6421118 is a deficient number, since it is larger than the sum of its proper divisors (4086202).

6421118 is a wasteful number, since it uses less digits than its factorization.

6421118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291882.

The product of its digits is 384, while the sum is 23.

The square root of 6421118 is about 2533.9925019621. The cubic root of 6421118 is about 185.8675397137.

It can be divided in two parts, 6 and 421118, that added together give a palindrome (421124).

The spelling of 6421118 in words is "six million, four hundred twenty-one thousand, one hundred eighteen".