42542719 has 2 divisors, whose sum is σ = 42542720. Its totient is φ = 42542718.

The previous prime is 42542713. The next prime is 42542723. The reversal of 42542719 is 91724524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42542719 - 2²³ = 34154111 is a prime.

It is a super-2 number, since 2×42542719² = 3619765879825922, which contains 22 as substring.

It is a congruent number.

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, 21271359 + 21271360.

It is an arithmetic number, because the mean of its divisors is an integer number (21271360).

Almost surely, 2^42542719 is an apocalyptic number.

42542719 is a deficient number, since it is larger than the sum of its proper divisors (1).

42542719 is an equidigital number, since it uses as much as digits as its factorization.

42542719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 34.

The square root of 42542719 is about 6522.4779800318. The cubic root of 42542719 is about 349.0934881442.

The spelling of 42542719 in words is "forty-two million, five hundred forty-two thousand, seven hundred nineteen".