5081161 has 2 divisors, whose sum is σ = 5081162. Its totient is φ = 5081160.

The previous prime is 5081159. The next prime is 5081191. The reversal of 5081161 is 1611805.

5081161 = T₁₈₃₉ + T₁₈₄₀ + T₁₈₄₁.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3686400 + 1394761 = 1920^2 + 1181^2 .

It is a cyclic number.

It is not a de Polignac number, because 5081161 - 2¹ = 5081159 is a prime.

Together with 5081159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5081101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2540580 + 2540581.

It is an arithmetic number, because the mean of its divisors is an integer number (2540581).

Almost surely, 2^5081161 is an apocalyptic number.

5081161 is the 1841-st centered triangular number.

It is an amenable number.

5081161 is a deficient number, since it is larger than the sum of its proper divisors (1).

5081161 is an equidigital number, since it uses as much as digits as its factorization.

5081161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 5081161 is about 2254.1430744298. The cubic root of 5081161 is about 171.9178555834.

Adding to 5081161 its reverse (1611805), we get a palindrome (6692966).

The spelling of 5081161 in words is "five million, eighty-one thousand, one hundred sixty-one".