4928921 has 4 divisors (see below), whose sum is σ = 4944144. Its totient is φ = 4913700.

The previous prime is 4928899. The next prime is 4928933. The reversal of 4928921 is 1298294.

4928921 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 Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1298294 = 2 ⋅649147.

It is a cyclic number.

It is not a de Polignac number, because 4928921 - 2⁶ = 4928857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4928941) 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, 7115 + ... + 7776.

It is an arithmetic number, because the mean of its divisors is an integer number (1236036).

Almost surely, 2^4928921 is an apocalyptic number.

It is an amenable number.

4928921 is a deficient number, since it is larger than the sum of its proper divisors (15223).

4928921 is a wasteful number, since it uses less digits than its factorization.

4928921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15222.

The product of its digits is 10368, while the sum is 35.

The square root of 4928921 is about 2220.1173392413. The cubic root of 4928921 is about 170.1834352146.

The spelling of 4928921 in words is "four million, nine hundred twenty-eight thousand, nine hundred twenty-one".