4021404 has 12 divisors (see below), whose sum is σ = 9383304. Its totient is φ = 1340464.

The previous prime is 4021399. The next prime is 4021411. The reversal of 4021404 is 4041204.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167547 + ... + 167570.

It is an arithmetic number, because the mean of its divisors is an integer number (781942).

Almost surely, 2^4021404 is an apocalyptic number.

It is an amenable number.

4021404 is an abundant number, since it is smaller than the sum of its proper divisors (5361900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4021404 is a wasteful number, since it uses less digits than its factorization.

4021404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335124 (or 335122 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 4021404 is about 2005.3438607880. The cubic root of 4021404 is about 159.0227411007.

Adding to 4021404 its reverse (4041204), we get a palindrome (8062608).

The spelling of 4021404 in words is "four million, twenty-one thousand, four hundred four".