42100989 has 8 divisors (see below), whose sum is σ = 64153920. Its totient is φ = 24057696.

The previous prime is 42100987. The next prime is 42100997. The reversal of 42100989 is 98900124.

42100989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42100989 - 2¹ = 42100987 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42100987) 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, 1002384 + ... + 1002425.

It is an arithmetic number, because the mean of its divisors is an integer number (8019240).

Almost surely, 2^42100989 is an apocalyptic number.

It is an amenable number.

42100989 is a deficient number, since it is larger than the sum of its proper divisors (22052931).

42100989 is a wasteful number, since it uses less digits than its factorization.

42100989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004819.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 42100989 is about 6488.5274908873. The cubic root of 42100989 is about 347.8810450213.

The spelling of 42100989 in words is "forty-two million, one hundred thousand, nine hundred eighty-nine".