405604542 has 16 divisors (see below), whose sum is σ = 927096192. Its totient is φ = 115887000.

The previous prime is 405604541. The next prime is 405604553. The reversal of 405604542 is 245406504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405604541) by changing a digit.

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, 4828584 + ... + 4828667.

It is an arithmetic number, because the mean of its divisors is an integer number (57943512).

Almost surely, 2^405604542 is an apocalyptic number.

405604542 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

405604542 is an abundant number, since it is smaller than the sum of its proper divisors (521491650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405604542 is a wasteful number, since it uses less digits than its factorization.

405604542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9657263.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 405604542 is about 20139.6261633626. The cubic root of 405604542 is about 740.2315698448.

The spelling of 405604542 in words is "four hundred five million, six hundred four thousand, five hundred forty-two".