42547243 has 4 divisors (see below), whose sum is σ = 45050040. Its totient is φ = 40044448.

The previous prime is 42547237. The next prime is 42547249. The reversal of 42547243 is 34274524.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (42547237) and next prime (42547249).

It is a cyclic number.

It is not a de Polignac number, because 42547243 - 2²⁵ = 8992811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42547249) 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, 1251373 + ... + 1251406.

It is an arithmetic number, because the mean of its divisors is an integer number (11262510).

Almost surely, 2^42547243 is an apocalyptic number.

42547243 is a deficient number, since it is larger than the sum of its proper divisors (2502797).

42547243 is a wasteful number, since it uses less digits than its factorization.

42547243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502796.

The product of its digits is 26880, while the sum is 31.

The square root of 42547243 is about 6522.8247715235. The cubic root of 42547243 is about 349.1058619260.

The spelling of 42547243 in words is "forty-two million, five hundred forty-seven thousand, two hundred forty-three".