5175721 has 2 divisors, whose sum is σ = 5175722. Its totient is φ = 5175720.

The previous prime is 5175719. The next prime is 5175727. The reversal of 5175721 is 1275715.

5175721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5107600 + 68121 = 2260^2 + 261^2 .

It is a cyclic number.

It is not a de Polignac number, because 5175721 - 2¹ = 5175719 is a prime.

Together with 5175719, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 5175721.

It is not a weakly prime, because it can be changed into another prime (5175727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2587860 + 2587861.

It is an arithmetic number, because the mean of its divisors is an integer number (2587861).

Almost surely, 2^5175721 is an apocalyptic number.

It is an amenable number.

5175721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5175721 is an equidigital number, since it uses as much as digits as its factorization.

5175721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2450, while the sum is 28.

The square root of 5175721 is about 2275.0210988033. The cubic root of 5175721 is about 172.9777667531.

The spelling of 5175721 in words is "five million, one hundred seventy-five thousand, seven hundred twenty-one".