6612321 has 4 divisors (see below), whose sum is σ = 8816432. Its totient is φ = 4408212.

The previous prime is 6612313. The next prime is 6612341. The reversal of 6612321 is 1232166.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6612321 - 2³ = 6612313 is a prime.

It is a D-number.

It is a Duffinian number.

6612321 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6612311) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1102051 + ... + 1102056.

It is an arithmetic number, because the mean of its divisors is an integer number (2204108).

Almost surely, 2^6612321 is an apocalyptic number.

It is an amenable number.

6612321 is a deficient number, since it is larger than the sum of its proper divisors (2204111).

6612321 is a wasteful number, since it uses less digits than its factorization.

6612321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204110.

The product of its digits is 432, while the sum is 21.

The square root of 6612321 is about 2571.4433690050. The cubic root of 6612321 is about 187.6943974927.

Adding to 6612321 its reverse (1232166), we get a palindrome (7844487).

The spelling of 6612321 in words is "six million, six hundred twelve thousand, three hundred twenty-one".