42542819 has 8 divisors (see below), whose sum is σ = 47907840. Its totient is φ = 37427400.

The previous prime is 42542807. The next prime is 42542827. The reversal of 42542819 is 91824524.

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

It is a cyclic number.

It is not a de Polignac number, because 42542819 - 2¹² = 42538723 is a prime.

It is a super-2 number, since 2×42542819² = 3619782896933522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42542519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62039 + ... + 62720.

It is an arithmetic number, because the mean of its divisors is an integer number (5988480).

Almost surely, 2^42542819 is an apocalyptic number.

42542819 is a deficient number, since it is larger than the sum of its proper divisors (5365021).

42542819 is a wasteful number, since it uses less digits than its factorization.

42542819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124801.

The product of its digits is 23040, while the sum is 35.

The square root of 42542819 is about 6522.4856458255. The cubic root of 42542819 is about 349.0937616679.

The spelling of 42542819 in words is "forty-two million, five hundred forty-two thousand, eight hundred nineteen".