5230721 has 4 divisors (see below), whose sum is σ = 5251332. Its totient is φ = 5210112.

The previous prime is 5230717. The next prime is 5230733. The reversal of 5230721 is 1270325.

5230721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3940225 + 1290496 = 1985^2 + 1136^2 .

It is a cyclic number.

It is not a de Polignac number, because 5230721 - 2² = 5230717 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5230693 and 5230702.

It is not an unprimeable number, because it can be changed into a prime (5230741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9920 + ... + 10433.

It is an arithmetic number, because the mean of its divisors is an integer number (1312833).

Almost surely, 2^5230721 is an apocalyptic number.

It is an amenable number.

5230721 is a deficient number, since it is larger than the sum of its proper divisors (20611).

5230721 is a wasteful number, since it uses less digits than its factorization.

5230721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20610.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 5230721 is about 2287.0769554171. The cubic root of 5230721 is about 173.5883274341.

The spelling of 5230721 in words is "five million, two hundred thirty thousand, seven hundred twenty-one".