42605405 has 8 divisors (see below), whose sum is σ = 51465984. Its totient is φ = 33858000.

The previous prime is 42605393. The next prime is 42605413. The reversal of 42605405 is 50450624.

42605405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42605405 - 2¹² = 42601309 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 27461 + ... + 28970.

It is an arithmetic number, because the mean of its divisors is an integer number (6433248).

Almost surely, 2^42605405 is an apocalyptic number.

It is an amenable number.

42605405 is a deficient number, since it is larger than the sum of its proper divisors (8860579).

42605405 is a wasteful number, since it uses less digits than its factorization.

42605405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56587.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 42605405 is about 6527.2815934354. The cubic root of 42605405 is about 349.2648651780.

The spelling of 42605405 in words is "forty-two million, six hundred five thousand, four hundred five".