42404020405 has 8 divisors (see below), whose sum is σ = 51250903200. Its totient is φ = 33679163856.

The previous prime is 42404020327. The next prime is 42404020411. The reversal of 42404020405 is 50402040424.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42404020405 - 2²¹ = 42401923253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42404020405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30505795 + ... + 30507184.

It is an arithmetic number, because the mean of its divisors is an integer number (6406362900).

Almost surely, 2^42404020405 is an apocalyptic number.

It is an amenable number.

42404020405 is a deficient number, since it is larger than the sum of its proper divisors (8846882795).

42404020405 is a wasteful number, since it uses less digits than its factorization.

42404020405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61013123.

The product of its (nonzero) digits is 5120, while the sum is 25.

Adding to 42404020405 its reverse (50402040424), we get a palindrome (92806060829).

The spelling of 42404020405 in words is "forty-two billion, four hundred four million, twenty thousand, four hundred five".