42536243 has 4 divisors (see below), whose sum is σ = 44003040. Its totient is φ = 41069448.

The previous prime is 42536239. The next prime is 42536287. The reversal of 42536243 is 34263524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42536243 - 2² = 42536239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 1466767 = 42536243 / (4 + 2 + 5 + 3 + 6 + 2 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42536213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 733355 + ... + 733412.

It is an arithmetic number, because the mean of its divisors is an integer number (11000760).

Almost surely, 2^42536243 is an apocalyptic number.

42536243 is a deficient number, since it is larger than the sum of its proper divisors (1466797).

42536243 is a wasteful number, since it uses less digits than its factorization.

42536243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466796.

The product of its digits is 17280, while the sum is 29.

The square root of 42536243 is about 6521.9815240462. The cubic root of 42536243 is about 349.0757738388.

Adding to 42536243 its reverse (34263524), we get a palindrome (76799767).

The spelling of 42536243 in words is "forty-two million, five hundred thirty-six thousand, two hundred forty-three".