42238087 has 2 divisors, whose sum is σ = 42238088. Its totient is φ = 42238086.

The previous prime is 42238067. The next prime is 42238103. The reversal of 42238087 is 78083224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42238087 - 2¹¹ = 42236039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42238067) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21119043 + 21119044.

It is an arithmetic number, because the mean of its divisors is an integer number (21119044).

Almost surely, 2^42238087 is an apocalyptic number.

42238087 is a deficient number, since it is larger than the sum of its proper divisors (1).

42238087 is an equidigital number, since it uses as much as digits as its factorization.

42238087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 42238087 is about 6499.0835507785. The cubic root of 42238087 is about 348.2582500858.

The spelling of 42238087 in words is "forty-two million, two hundred thirty-eight thousand, eighty-seven".