4044821 has 4 divisors (see below), whose sum is σ = 4412544. Its totient is φ = 3677100.

The previous prime is 4044811. The next prime is 4044841. The reversal of 4044821 is 1284404.

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 4044821 - 2¹⁸ = 3782677 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 (4044811) 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, 183845 + ... + 183866.

It is an arithmetic number, because the mean of its divisors is an integer number (1103136).

Almost surely, 2^4044821 is an apocalyptic number.

It is an amenable number.

4044821 is a deficient number, since it is larger than the sum of its proper divisors (367723).

4044821 is a wasteful number, since it uses less digits than its factorization.

4044821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367722.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 4044821 is about 2011.1740352341. The cubic root of 4044821 is about 159.3308118429.

It can be divided in two parts, 404 and 4821, that added together give a palindrome (5225).

The spelling of 4044821 in words is "four million, forty-four thousand, eight hundred twenty-one".