42128558 has 8 divisors (see below), whose sum is σ = 63617400. Its totient is φ = 20922760.

The previous prime is 42128557. The next prime is 42128579. The reversal of 42128558 is 85582124.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42128551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70388 + ... + 70983.

It is an arithmetic number, because the mean of its divisors is an integer number (7952175).

Almost surely, 2^42128558 is an apocalyptic number.

42128558 is a deficient number, since it is larger than the sum of its proper divisors (21488842).

42128558 is a wasteful number, since it uses less digits than its factorization.

42128558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141522.

The product of its digits is 25600, while the sum is 35.

The square root of 42128558 is about 6490.6515851646. The cubic root of 42128558 is about 347.9569627934.

The spelling of 42128558 in words is "forty-two million, one hundred twenty-eight thousand, five hundred fifty-eight".