42100542 has 96 divisors (see below), whose sum is σ = 108426240. Its totient is φ = 11696400.

The previous prime is 42100519. The next prime is 42100543. The reversal of 42100542 is 24500124.

42100542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42100543) 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 47 ways as a sum of consecutive naturals, for example, 1358067 + ... + 1358097.

It is an arithmetic number, because the mean of its divisors is an integer number (1129440).

Almost surely, 2^42100542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42100542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54213120).

42100542 is an abundant number, since it is smaller than the sum of its proper divisors (66325698).

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

42100542 is a wasteful number, since it uses less digits than its factorization.

42100542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 42100542 is about 6488.4930453843. The cubic root of 42100542 is about 347.8798138279.

Adding to 42100542 its reverse (24500124), we get a palindrome (66600666).

The spelling of 42100542 in words is "forty-two million, one hundred thousand, five hundred forty-two".