4820721 has 8 divisors (see below), whose sum is σ = 6549120. Its totient is φ = 3153072.

The previous prime is 4820719. The next prime is 4820747. The reversal of 4820721 is 1270284.

4820721 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4820721 - 2¹ = 4820719 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4820691 and 4820700.

It is not an unprimeable number, because it can be changed into a prime (4820791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15001 + ... + 15318.

It is an arithmetic number, because the mean of its divisors is an integer number (818640).

Almost surely, 2^4820721 is an apocalyptic number.

It is an amenable number.

4820721 is a deficient number, since it is larger than the sum of its proper divisors (1728399).

4820721 is a wasteful number, since it uses less digits than its factorization.

4820721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30375.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 4820721 is about 2195.6140371204. The cubic root of 4820721 is about 168.9289175056.

The spelling of 4820721 in words is "four million, eight hundred twenty thousand, seven hundred twenty-one".