42536439 has 12 divisors (see below), whose sum is σ = 67027272. Its totient is φ = 25779600.

The previous prime is 42536381. The next prime is 42536441. The reversal of 42536439 is 93463524.

42536439 is a `hidden beast` number, since 4 + 2 + 5 + 3 + 643 + 9 = 666.

It is not a de Polignac number, because 42536439 - 2⁸ = 42536183 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42536489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214732 + ... + 214929.

It is an arithmetic number, because the mean of its divisors is an integer number (5585606).

Almost surely, 2^42536439 is an apocalyptic number.

42536439 is a deficient number, since it is larger than the sum of its proper divisors (24490833).

42536439 is a wasteful number, since it uses less digits than its factorization.

42536439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429678 (or 429675 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 42536439 is about 6521.9965501371. The cubic root of 42536439 is about 349.0763099992.

It can be divided in two parts, 425 and 36439, that added together give a square (36864 = 192²).

The spelling of 42536439 in words is "forty-two million, five hundred thirty-six thousand, four hundred thirty-nine".