42415405 has 4 divisors (see below), whose sum is σ = 50898492. Its totient is φ = 33932320.

The previous prime is 42415397. The next prime is 42415441. The reversal of 42415405 is 50451424.

It is a happy number.

42415405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4247721 + 38167684 = 2061^2 + 6178^2 .

It is not a de Polignac number, because 42415405 - 2³ = 42415397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42415405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4241536 + ... + 4241545.

It is an arithmetic number, because the mean of its divisors is an integer number (12724623).

Almost surely, 2^42415405 is an apocalyptic number.

It is an amenable number.

42415405 is a deficient number, since it is larger than the sum of its proper divisors (8483087).

42415405 is an equidigital number, since it uses as much as digits as its factorization.

42415405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8483086.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 42415405 is about 6512.7110330491. The cubic root of 42415405 is about 348.7449059948.

Adding to 42415405 its reverse (50451424), we get a palindrome (92866829).

The spelling of 42415405 in words is "forty-two million, four hundred fifteen thousand, four hundred five".