4809421 has 4 divisors (see below), whose sum is σ = 4921312. Its totient is φ = 4697532.

The previous prime is 4809401. The next prime is 4809443. The reversal of 4809421 is 1249084.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4809421 is a prime.

It is a super-3 number, since 3×4809421³ (a number of 21 digits) contains 333 as substring.

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 4809421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4809401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55881 + ... + 55966.

It is an arithmetic number, because the mean of its divisors is an integer number (1230328).

Almost surely, 2^4809421 is an apocalyptic number.

It is an amenable number.

4809421 is a deficient number, since it is larger than the sum of its proper divisors (111891).

4809421 is a wasteful number, since it uses less digits than its factorization.

4809421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111890.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 4809421 is about 2193.0392153356. The cubic root of 4809421 is about 168.7968217583.

The spelling of 4809421 in words is "four million, eight hundred nine thousand, four hundred twenty-one".