42554556 has 72 divisors (see below), whose sum is σ = 120255408. Its totient is φ = 12576000.

The previous prime is 42554543. The next prime is 42554591. The reversal of 42554556 is 65545524.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 42554556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14926 + ... + 17546.

It is an arithmetic number, because the mean of its divisors is an integer number (1670214).

Almost surely, 2^42554556 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 42554556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60127704).

42554556 is an abundant number, since it is smaller than the sum of its proper divisors (77700852).

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

42554556 is a wasteful number, since it uses less digits than its factorization.

42554556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683 (or 2678 counting only the distinct ones).

The product of its digits is 120000, while the sum is 36.

The square root of 42554556 is about 6523.3853174560. The cubic root of 42554556 is about 349.1258621636.

The spelling of 42554556 in words is "forty-two million, five hundred fifty-four thousand, five hundred fifty-six".