6612121 has 8 divisors (see below), whose sum is σ = 6833160. Its totient is φ = 6394752.

The previous prime is 6612119. The next prime is 6612127. The reversal of 6612121 is 1212166.

It can be written as a sum of positive squares in 4 ways, for example, as 876096 + 5736025 = 936^2 + 2395^2 .

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 6612121 - 2¹ = 6612119 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 (6612127) 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 7 ways as a sum of consecutive naturals, for example, 3015 + ... + 4723.

It is an arithmetic number, because the mean of its divisors is an integer number (854145).

Almost surely, 2^6612121 is an apocalyptic number.

It is an amenable number.

6612121 is a deficient number, since it is larger than the sum of its proper divisors (221039).

6612121 is a wasteful number, since it uses less digits than its factorization.

6612121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835.

The product of its digits is 144, while the sum is 19.

The square root of 6612121 is about 2571.4044800459. The cubic root of 6612121 is about 187.6925051034.

Adding to 6612121 its reverse (1212166), we get a palindrome (7824287).

The spelling of 6612121 in words is "six million, six hundred twelve thousand, one hundred twenty-one".