4728521 has 8 divisors (see below), whose sum is σ = 5421504. Its totient is φ = 4039920.

The previous prime is 4728497. The next prime is 4728527. The reversal of 4728521 is 1258274.

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

It is a cyclic number.

It is not a de Polignac number, because 4728521 - 2¹⁰ = 4727497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4728527) 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, 1706 + ... + 3516.

It is an arithmetic number, because the mean of its divisors is an integer number (677688).

Almost surely, 2^4728521 is an apocalyptic number.

It is an amenable number.

4728521 is a deficient number, since it is larger than the sum of its proper divisors (692983).

4728521 is a wasteful number, since it uses less digits than its factorization.

4728521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191.

The product of its digits is 4480, while the sum is 29.

The square root of 4728521 is about 2174.5162680468. The cubic root of 4728521 is about 167.8450124843.

The spelling of 4728521 in words is "four million, seven hundred twenty-eight thousand, five hundred twenty-one".