404124421 has 16 divisors (see below), whose sum is σ = 429580800. Its totient is φ = 379387008.

The previous prime is 404124361. The next prime is 404124431. The reversal of 404124421 is 124421404.

It is a cyclic number.

It is not a de Polignac number, because 404124421 - 2¹¹ = 404122373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404124392 and 404124401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404124431) 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, 357385 + ... + 358513.

It is an arithmetic number, because the mean of its divisors is an integer number (26848800).

Almost surely, 2^404124421 is an apocalyptic number.

It is an amenable number.

404124421 is a deficient number, since it is larger than the sum of its proper divisors (25456379).

404124421 is a wasteful number, since it uses less digits than its factorization.

404124421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 404124421 is about 20102.8460920338. The cubic root of 404124421 is about 739.3300614350.

Adding to 404124421 its reverse (124421404), we get a palindrome (528545825).

The spelling of 404124421 in words is "four hundred four million, one hundred twenty-four thousand, four hundred twenty-one".