404014021 has 16 divisors (see below), whose sum is σ = 435101184. Its totient is φ = 374229504.

The previous prime is 404014019. The next prime is 404014033. The reversal of 404014021 is 120410404.

It is not a de Polignac number, because 404014021 - 2¹ = 404014019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 404013986 and 404014004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404014421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102931 + ... + 106783.

It is an arithmetic number, because the mean of its divisors is an integer number (27193824).

Almost surely, 2^404014021 is an apocalyptic number.

It is an amenable number.

404014021 is a deficient number, since it is larger than the sum of its proper divisors (31087163).

404014021 is a wasteful number, since it uses less digits than its factorization.

404014021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4020.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 404014021 is about 20100.1000246267. The cubic root of 404014021 is about 739.2627311210.

Adding to 404014021 its reverse (120410404), we get a palindrome (524424425).

The spelling of 404014021 in words is "four hundred four million, fourteen thousand, twenty-one".