42605556 has 48 divisors (see below), whose sum is σ = 114401280. Its totient is φ = 12088800.

The previous prime is 42605551. The next prime is 42605573. The reversal of 42605556 is 65550624.

It is a happy number.

42605556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42605551) 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 15 ways as a sum of consecutive naturals, for example, 11005 + ... + 14363.

It is an arithmetic number, because the mean of its divisors is an integer number (2383360).

Almost surely, 2^42605556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42605556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57200640).

42605556 is an abundant number, since it is smaller than the sum of its proper divisors (71795724).

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

42605556 is a wasteful number, since it uses less digits than its factorization.

42605556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3524 (or 3522 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 42605556 is about 6527.2931602618. The cubic root of 42605556 is about 349.2652777934.

The spelling of 42605556 in words is "forty-two million, six hundred five thousand, five hundred fifty-six".