404040103421 has 4 divisors (see below), whose sum is σ = 404068983612. Its totient is φ = 404011223232.

The previous prime is 404040103409. The next prime is 404040103463. The reversal of 404040103421 is 124301040404.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 329011224025 + 75028879396 = 573595^2 + 273914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404040103421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404040108421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14419100 + ... + 14447093.

It is an arithmetic number, because the mean of its divisors is an integer number (101017245903).

Almost surely, 2^404040103421 is an apocalyptic number.

It is an amenable number.

404040103421 is a deficient number, since it is larger than the sum of its proper divisors (28880191).

404040103421 is a wasteful number, since it uses less digits than its factorization.

404040103421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28880190.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 404040103421 its reverse (124301040404), we get a palindrome (528341143825).

The spelling of 404040103421 in words is "four hundred four billion, forty million, one hundred three thousand, four hundred twenty-one".