5720521 has 4 divisors (see below), whose sum is σ = 5725332. Its totient is φ = 5715712.

The previous prime is 5720479. The next prime is 5720531. The reversal of 5720521 is 1250275.

5720521 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, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1863225 + 3857296 = 1365^2 + 1964^2 .

It is a cyclic number.

It is not a de Polignac number, because 5720521 - 2¹⁷ = 5589449 is a prime.

It is a super-2 number, since 2×5720521² = 65448721022882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5720492 and 5720501.

It is not an unprimeable number, because it can be changed into a prime (5720531) 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, 825 + ... + 3481.

It is an arithmetic number, because the mean of its divisors is an integer number (1431333).

Almost surely, 2^5720521 is an apocalyptic number.

It is an amenable number.

5720521 is a deficient number, since it is larger than the sum of its proper divisors (4811).

5720521 is a wasteful number, since it uses less digits than its factorization.

5720521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4810.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 5720521 is about 2391.7610666620. The cubic root of 5720521 is about 178.8457103944.

Adding to 5720521 its reverse (1250275), we get a palindrome (6970796).

It can be divided in two parts, 5720 and 521, that added together give a square (6241 = 79²).

The spelling of 5720521 in words is "five million, seven hundred twenty thousand, five hundred twenty-one".