42536239 has 2 divisors, whose sum is σ = 42536240. Its totient is φ = 42536238.

The previous prime is 42536233. The next prime is 42536287. The reversal of 42536239 is 93263524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42536239 - 2⁷ = 42536111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42536233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21268119 + 21268120.

It is an arithmetic number, because the mean of its divisors is an integer number (21268120).

Almost surely, 2^42536239 is an apocalyptic number.

42536239 is a deficient number, since it is larger than the sum of its proper divisors (1).

42536239 is an equidigital number, since it uses as much as digits as its factorization.

42536239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 34.

The square root of 42536239 is about 6521.9812173909. The cubic root of 42536239 is about 349.0757628968.

The spelling of 42536239 in words is "forty-two million, five hundred thirty-six thousand, two hundred thirty-nine".