405424401 has 24 divisors (see below), whose sum is σ = 558555264. Its totient is φ = 261480960.

The previous prime is 405424367. The next prime is 405424457. The reversal of 405424401 is 104424504.

It is a happy number.

It is not a de Polignac number, because 405424401 - 2¹⁵ = 405391633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405424471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1495896 + ... + 1496166.

It is an arithmetic number, because the mean of its divisors is an integer number (23273136).

Almost surely, 2^405424401 is an apocalyptic number.

It is an amenable number.

405424401 is a deficient number, since it is larger than the sum of its proper divisors (153130863).

405424401 is an equidigital number, since it uses as much as digits as its factorization.

405424401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 405424401 is about 20135.1533642036. The cubic root of 405424401 is about 740.1219673566.

Adding to 405424401 its reverse (104424504), we get a palindrome (509848905).

The spelling of 405424401 in words is "four hundred five million, four hundred twenty-four thousand, four hundred one".