42542445 has 32 divisors (see below), whose sum is σ = 75116160. Its totient is φ = 20387840.

The previous prime is 42542443. The next prime is 42542459. The reversal of 42542445 is 54424524.

It is not a de Polignac number, because 42542445 - 2¹ = 42542443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42542443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13237 + ... + 16133.

It is an arithmetic number, because the mean of its divisors is an integer number (2347380).

Almost surely, 2^42542445 is an apocalyptic number.

It is an amenable number.

42542445 is a deficient number, since it is larger than the sum of its proper divisors (32573715).

42542445 is a wasteful number, since it uses less digits than its factorization.

42542445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005.

The product of its digits is 25600, while the sum is 30.

The square root of 42542445 is about 6522.4569757109. The cubic root of 42542445 is about 349.0927386872.

Adding to 42542445 its reverse (54424524), we get a palindrome (96966969).

The spelling of 42542445 in words is "forty-two million, five hundred forty-two thousand, four hundred forty-five".