5720721 has 16 divisors (see below), whose sum is σ = 8429184. Its totient is φ = 3432704.

The previous prime is 5720711. The next prime is 5720731. The reversal of 5720721 is 1270275.

5720721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (5720711) and next prime (5720731).

It is not a de Polignac number, because 5720721 - 2⁶ = 5720657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5720691 and 5720700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5720711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1266 + ... + 3611.

It is an arithmetic number, because the mean of its divisors is an integer number (526824).

Almost surely, 2^5720721 is an apocalyptic number.

5720721 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

5720721 is a deficient number, since it is larger than the sum of its proper divisors (2708463).

5720721 is a wasteful number, since it uses less digits than its factorization.

5720721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4920.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 5720721 is about 2391.8028764930. The cubic root of 5720721 is about 178.8477946291.

Adding to 5720721 its reverse (1270275), we get a palindrome (6990996).

It can be divided in two parts, 5720 and 721, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 5720721 in words is "five million, seven hundred twenty thousand, seven hundred twenty-one".