42542113 has 2 divisors, whose sum is σ = 42542114. Its totient is φ = 42542112.

The previous prime is 42542099. The next prime is 42542131. The reversal of 42542113 is 31124524.

Together with next prime (42542131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41177889 + 1364224 = 6417^2 + 1168^2 .

It is a cyclic number.

It is not a de Polignac number, because 42542113 - 2¹³ = 42533921 is a prime.

It is not a weakly prime, because it can be changed into another prime (42542713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21271056 + 21271057.

It is an arithmetic number, because the mean of its divisors is an integer number (21271057).

Almost surely, 2^42542113 is an apocalyptic number.

It is an amenable number.

42542113 is a deficient number, since it is larger than the sum of its proper divisors (1).

42542113 is an equidigital number, since it uses as much as digits as its factorization.

42542113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 22.

The square root of 42542113 is about 6522.4315251293. The cubic root of 42542113 is about 349.0918305816.

Adding to 42542113 its reverse (31124524), we get a palindrome (73666637).

The spelling of 42542113 in words is "forty-two million, five hundred forty-two thousand, one hundred thirteen".