404305421 has 16 divisors (see below), whose sum is σ = 445804800. Its totient is φ = 364333248.

The previous prime is 404305417. The next prime is 404305457. The reversal of 404305421 is 124503404.

It is a cyclic number.

It is not a de Polignac number, because 404305421 - 2² = 404305417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404305481) 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, 377675 + ... + 378743.

It is an arithmetic number, because the mean of its divisors is an integer number (27862800).

Almost surely, 2^404305421 is an apocalyptic number.

It is an amenable number.

404305421 is a deficient number, since it is larger than the sum of its proper divisors (41499379).

404305421 is a wasteful number, since it uses less digits than its factorization.

404305421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 404305421 is about 20107.3474381879. The cubic root of 404305421 is about 739.4404224697.

Adding to 404305421 its reverse (124503404), we get a palindrome (528808825).

The spelling of 404305421 in words is "four hundred four million, three hundred five thousand, four hundred twenty-one".