404240202421 has 8 divisors (see below), whose sum is σ = 441568807488. Its totient is φ = 367008180000.

The previous prime is 404240202407. The next prime is 404240202439. The reversal of 404240202421 is 124202042404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 404240202421 - 2¹⁷ = 404240071349 is a prime.

It is a super-2 number, since 2×404240202421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404240202521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24136905 + ... + 24153646.

It is an arithmetic number, because the mean of its divisors is an integer number (55196100936).

Almost surely, 2^404240202421 is an apocalyptic number.

It is an amenable number.

404240202421 is a deficient number, since it is larger than the sum of its proper divisors (37328605067).

404240202421 is a wasteful number, since it uses less digits than its factorization.

404240202421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48291323.

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 404240202421 its reverse (124202042404), we get a palindrome (528442244825).

The spelling of 404240202421 in words is "four hundred four billion, two hundred forty million, two hundred two thousand, four hundred twenty-one".