4481821 has 4 divisors (see below), whose sum is σ = 4496544. Its totient is φ = 4467100.

The previous prime is 4481819. The next prime is 4481837. The reversal of 4481821 is 1281844.

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 not a de Polignac number, because 4481821 - 2¹ = 4481819 is a prime.

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 4481821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4481801) 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, 6895 + ... + 7516.

It is an arithmetic number, because the mean of its divisors is an integer number (1124136).

Almost surely, 2^4481821 is an apocalyptic number.

It is an amenable number.

4481821 is a deficient number, since it is larger than the sum of its proper divisors (14723).

4481821 is a wasteful number, since it uses less digits than its factorization.

4481821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14722.

The product of its digits is 2048, while the sum is 28.

The square root of 4481821 is about 2117.0311759632. The cubic root of 4481821 is about 164.8737448611.

The spelling of 4481821 in words is "four million, four hundred eighty-one thousand, eight hundred twenty-one".