5160721 has 2 divisors, whose sum is σ = 5160722. Its totient is φ = 5160720.

The previous prime is 5160719. The next prime is 5160733. The reversal of 5160721 is 1270615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4752400 + 408321 = 2180^2 + 639^2 .

It is a cyclic number.

It is not a de Polignac number, because 5160721 - 2¹ = 5160719 is a prime.

Together with 5160719, it forms a pair of twin primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 5160692 and 5160701.

It is not a weakly prime, because it can be changed into another prime (5160781) 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, 2580360 + 2580361.

It is an arithmetic number, because the mean of its divisors is an integer number (2580361).

Almost surely, 2^5160721 is an apocalyptic number.

It is an amenable number.

5160721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5160721 is an equidigital number, since it uses as much as digits as its factorization.

5160721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 5160721 is about 2271.7220340526. The cubic root of 5160721 is about 172.8105000657.

The spelling of 5160721 in words is "five million, one hundred sixty thousand, seven hundred twenty-one".