42405406 has 8 divisors (see below), whose sum is σ = 64808424. Its totient is φ = 20802600.

The previous prime is 42405379. The next prime is 42405413. The reversal of 42405406 is 60450424.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199920 + ... + 200131.

It is an arithmetic number, because the mean of its divisors is an integer number (8101053).

Almost surely, 2^42405406 is an apocalyptic number.

42405406 is a deficient number, since it is larger than the sum of its proper divisors (22403018).

42405406 is a wasteful number, since it uses less digits than its factorization.

42405406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400106.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 42405406 is about 6511.9433351343. The cubic root of 42405406 is about 348.7174994871.

The spelling of 42405406 in words is "forty-two million, four hundred five thousand, four hundred six".