405113421 has 16 divisors (see below), whose sum is σ = 593303040. Its totient is φ = 244735920.

The previous prime is 405113413. The next prime is 405113437. The reversal of 405113421 is 124311504.

It is not a de Polignac number, because 405113421 - 2³ = 405113413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405113461) 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, 153195 + ... + 155816.

It is an arithmetic number, because the mean of its divisors is an integer number (37081440).

Almost surely, 2^405113421 is an apocalyptic number.

It is an amenable number.

405113421 is a deficient number, since it is larger than the sum of its proper divisors (188189619).

405113421 is a wasteful number, since it uses less digits than its factorization.

405113421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309056.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 405113421 is about 20127.4295676323. The cubic root of 405113421 is about 739.9326825786.

Adding to 405113421 its reverse (124311504), we get a palindrome (529424925).

The spelling of 405113421 in words is "four hundred five million, one hundred thirteen thousand, four hundred twenty-one".