42542497 has 2 divisors, whose sum is σ = 42542498. Its totient is φ = 42542496.

The previous prime is 42542477. The next prime is 42542503. The reversal of 42542497 is 79424524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27050401 + 15492096 = 5201^2 + 3936^2 .

It is a cyclic number.

It is not a de Polignac number, because 42542497 - 2¹⁵ = 42509729 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42542417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21271248 + 21271249.

It is an arithmetic number, because the mean of its divisors is an integer number (21271249).

Almost surely, 2^42542497 is an apocalyptic number.

It is an amenable number.

42542497 is a deficient number, since it is larger than the sum of its proper divisors (1).

42542497 is an equidigital number, since it uses as much as digits as its factorization.

42542497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 37.

The square root of 42542497 is about 6522.4609619376. The cubic root of 42542497 is about 349.0928809202.

The spelling of 42542497 in words is "forty-two million, five hundred forty-two thousand, four hundred ninety-seven".