6531121 has 2 divisors, whose sum is σ = 6531122. Its totient is φ = 6531120.

The previous prime is 6531113. The next prime is 6531131. The reversal of 6531121 is 1211356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5832225 + 698896 = 2415^2 + 836^2 .

It is a cyclic number.

It is not a de Polignac number, because 6531121 - 2³ = 6531113 is a prime.

It is not a weakly prime, because it can be changed into another prime (6531101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3265560 + 3265561.

It is an arithmetic number, because the mean of its divisors is an integer number (3265561).

Almost surely, 2^6531121 is an apocalyptic number.

It is an amenable number.

6531121 is a deficient number, since it is larger than the sum of its proper divisors (1).

6531121 is an equidigital number, since it uses as much as digits as its factorization.

6531121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 19.

The square root of 6531121 is about 2555.6057990230. The cubic root of 6531121 is about 186.9229285759.

Adding to 6531121 its reverse (1211356), we get a palindrome (7742477).

The spelling of 6531121 in words is "six million, five hundred thirty-one thousand, one hundred twenty-one".