42542041 has 4 divisors (see below), whose sum is σ = 45044532. Its totient is φ = 40039552.

The previous prime is 42542011. The next prime is 42542047. The reversal of 42542041 is 14024524.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26574025 + 15968016 = 5155^2 + 3996^2 .

It is a cyclic number.

It is not a de Polignac number, because 42542041 - 2⁷ = 42541913 is a prime.

It is a Duffinian number.

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, 1251220 + ... + 1251253.

It is an arithmetic number, because the mean of its divisors is an integer number (11261133).

Almost surely, 2^42542041 is an apocalyptic number.

It is an amenable number.

42542041 is a deficient number, since it is larger than the sum of its proper divisors (2502491).

42542041 is a wasteful number, since it uses less digits than its factorization.

42542041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502490.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 42542041 is about 6522.4260057129. The cubic root of 42542041 is about 349.0916336425.

Adding to 42542041 its reverse (14024524), we get a palindrome (56566565).

The spelling of 42542041 in words is "forty-two million, five hundred forty-two thousand, forty-one".