6128221 has 8 divisors (see below), whose sum is σ = 6732000. Its totient is φ = 5532240.

The previous prime is 6128207. The next prime is 6128237. The reversal of 6128221 is 1228216.

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

It is a cyclic number.

It is not a de Polignac number, because 6128221 - 2¹⁹ = 5603933 is a prime.

6128221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6128192 and 6128201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6128201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231 + ... + 3508.

It is an arithmetic number, because the mean of its divisors is an integer number (841500).

Almost surely, 2^6128221 is an apocalyptic number.

It is an amenable number.

6128221 is a deficient number, since it is larger than the sum of its proper divisors (603779).

6128221 is a wasteful number, since it uses less digits than its factorization.

6128221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3899.

The product of its digits is 384, while the sum is 22.

The square root of 6128221 is about 2475.5243888922. The cubic root of 6128221 is about 182.9973523262.

It can be divided in two parts, 61 and 28221, that added together give a palindrome (28282).

The spelling of 6128221 in words is "six million, one hundred twenty-eight thousand, two hundred twenty-one".