42542042 has 8 divisors (see below), whose sum is σ = 66587616. Its totient is φ = 20346172.

The previous prime is 42542011. The next prime is 42542047. The reversal of 42542042 is 24024524.

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

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 42541999 and 42542017.

It is not an unprimeable number, because it can be changed into a prime (42542047) 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, 462368 + ... + 462459.

It is an arithmetic number, because the mean of its divisors is an integer number (8323452).

Almost surely, 2^42542042 is an apocalyptic number.

42542042 is a deficient number, since it is larger than the sum of its proper divisors (24045574).

42542042 is a wasteful number, since it uses less digits than its factorization.

42542042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924852.

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 42542042 is about 6522.4260823715. The cubic root of 42542042 is about 349.0916363777.

Adding to 42542042 its reverse (24024524), we get a palindrome (66566566).

The spelling of 42542042 in words is "forty-two million, five hundred forty-two thousand, forty-two".