5020721 has 4 divisors (see below), whose sum is σ = 5089572. Its totient is φ = 4951872.

The previous prime is 5020711. The next prime is 5020781. The reversal of 5020721 is 1270205.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1270205 = 5 ⋅254041.

It can be written as a sum of positive squares in 2 ways, for example, as 3168400 + 1852321 = 1780^2 + 1361^2 .

It is a cyclic number.

It is not a de Polignac number, because 5020721 - 2⁶ = 5020657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5020721.

It is not an unprimeable number, because it can be changed into a prime (5020711) 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, 34316 + ... + 34461.

It is an arithmetic number, because the mean of its divisors is an integer number (1272393).

Almost surely, 2^5020721 is an apocalyptic number.

It is an amenable number.

5020721 is a deficient number, since it is larger than the sum of its proper divisors (68851).

5020721 is an equidigital number, since it uses as much as digits as its factorization.

5020721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68850.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 5020721 is about 2240.6965434882. The cubic root of 5020721 is about 171.2334851853.

Adding to 5020721 its reverse (1270205), we get a palindrome (6290926).

The spelling of 5020721 in words is "five million, twenty thousand, seven hundred twenty-one".