5431121 has 2 divisors, whose sum is σ = 5431122. Its totient is φ = 5431120.

The previous prime is 5431067. The next prime is 5431123. The reversal of 5431121 is 1211345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4682896 + 748225 = 2164^2 + 865^2 .

It is a cyclic number.

It is not a de Polignac number, because 5431121 - 2⁶ = 5431057 is a prime.

Together with 5431123, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5431121.

It is not a weakly prime, because it can be changed into another prime (5431123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2715560 + 2715561.

It is an arithmetic number, because the mean of its divisors is an integer number (2715561).

Almost surely, 2^5431121 is an apocalyptic number.

It is an amenable number.

5431121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5431121 is an equidigital number, since it uses as much as digits as its factorization.

5431121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120, while the sum is 17.

The square root of 5431121 is about 2330.4765607060. The cubic root of 5431121 is about 175.7774498530. Note that the first 3 decimals are identical.

Adding to 5431121 its reverse (1211345), we get a palindrome (6642466).

The spelling of 5431121 in words is "five million, four hundred thirty-one thousand, one hundred twenty-one".