5611121 has 2 divisors, whose sum is σ = 5611122. Its totient is φ = 5611120.

The previous prime is 5611117. The next prime is 5611127. The reversal of 5611121 is 1211165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5340721 + 270400 = 2311^2 + 520^2 .

It is a cyclic number.

It is not a de Polignac number, because 5611121 - 2² = 5611117 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5611121.

It is not a weakly prime, because it can be changed into another prime (5611127) 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, 2805560 + 2805561.

It is an arithmetic number, because the mean of its divisors is an integer number (2805561).

Almost surely, 2^5611121 is an apocalyptic number.

It is an amenable number.

5611121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5611121 is an equidigital number, since it uses as much as digits as its factorization.

5611121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60, while the sum is 17.

The square root of 5611121 is about 2368.7804879304. The cubic root of 5611121 is about 177.6982747666.

Adding to 5611121 its reverse (1211165), we get a palindrome (6822286).

It can be divided in two parts, 561 and 1121, that multiplied together give a triangular number (628881 = T₁₁₂₁).

The spelling of 5611121 in words is "five million, six hundred eleven thousand, one hundred twenty-one".