6631121 has 6 divisors (see below), whose sum is σ = 7713810. Its totient is φ = 5683776.

The previous prime is 6631109. The next prime is 6631129. The reversal of 6631121 is 1211366.

It can be written as a sum of positive squares in only one way, i.e., 5499025 + 1132096 = 2345^2 + 1064^2 .

It is not a de Polignac number, because 6631121 - 2¹⁰ = 6630097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6631093 and 6631102.

It is not an unprimeable number, because it can be changed into a prime (6631129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67616 + ... + 67713.

It is an arithmetic number, because the mean of its divisors is an integer number (1285635).

Almost surely, 2^6631121 is an apocalyptic number.

It is an amenable number.

6631121 is a deficient number, since it is larger than the sum of its proper divisors (1082689).

6631121 is a wasteful number, since it uses less digits than its factorization.

6631121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135343 (or 135336 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

The square root of 6631121 is about 2575.0963088786. The cubic root of 6631121 is about 187.8721119820.

Adding to 6631121 its reverse (1211366), we get a palindrome (7842487).

The spelling of 6631121 in words is "six million, six hundred thirty-one thousand, one hundred twenty-one".