5320721 has 4 divisors (see below), whose sum is σ = 6080832. Its totient is φ = 4560612.

The previous prime is 5320709. The next prime is 5320727. The reversal of 5320721 is 1270235.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1270235 = 5 ⋅254047.

It is not a de Polignac number, because 5320721 - 2⁶ = 5320657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5320693 and 5320702.

It is not an unprimeable number, because it can be changed into a prime (5320727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380045 + ... + 380058.

It is an arithmetic number, because the mean of its divisors is an integer number (1520208).

Almost surely, 2^5320721 is an apocalyptic number.

It is an amenable number.

5320721 is a deficient number, since it is larger than the sum of its proper divisors (760111).

5320721 is an equidigital number, since it uses as much as digits as its factorization.

5320721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760110.

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

The square root of 5320721 is about 2306.6688102110. The cubic root of 5320721 is about 174.5782606407.

Adding to 5320721 its reverse (1270235), we get a palindrome (6590956).

The spelling of 5320721 in words is "five million, three hundred twenty thousand, seven hundred twenty-one".