42542503 has 2 divisors, whose sum is σ = 42542504. Its totient is φ = 42542502.

The previous prime is 42542497. The next prime is 42542519. The reversal of 42542503 is 30524524.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42542503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42542573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21271251 + 21271252.

It is an arithmetic number, because the mean of its divisors is an integer number (21271252).

Almost surely, 2^42542503 is an apocalyptic number.

42542503 is a deficient number, since it is larger than the sum of its proper divisors (1).

42542503 is an equidigital number, since it uses as much as digits as its factorization.

42542503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 42542503 is about 6522.4614218867. The cubic root of 42542503 is about 349.0928973317.

The spelling of 42542503 in words is "forty-two million, five hundred forty-two thousand, five hundred three".