4809921 has 8 divisors (see below), whose sum is σ = 6692160. Its totient is φ = 3067152.

The previous prime is 4809901. The next prime is 4809941. The reversal of 4809921 is 1299084.

It is an interprime number because it is at equal distance from previous prime (4809901) and next prime (4809941).

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

It is not a de Polignac number, because 4809921 - 2¹³ = 4801729 is a prime.

It is a super-3 number, since 3×4809921³ (a number of 21 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (4809901) 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, 34786 + ... + 34923.

It is an arithmetic number, because the mean of its divisors is an integer number (836520).

Almost surely, 2^4809921 is an apocalyptic number.

It is an amenable number.

4809921 is a deficient number, since it is larger than the sum of its proper divisors (1882239).

4809921 is a wasteful number, since it uses less digits than its factorization.

4809921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69735.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 4809921 is about 2193.1532094225. The cubic root of 4809921 is about 168.8026710755.

It can be divided in two parts, 480 and 9921, that added together give a palindrome (10401).

The spelling of 4809921 in words is "four million, eight hundred nine thousand, nine hundred twenty-one".