42447243 has 4 divisors (see below), whose sum is σ = 56596328. Its totient is φ = 28298160.

The previous prime is 42447239. The next prime is 42447257. The reversal of 42447243 is 34274424.

It is a happy number.

42447243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42447243 - 2² = 42447239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42447243.

It is not an unprimeable number, because it can be changed into a prime (42447233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7074538 + ... + 7074543.

It is an arithmetic number, because the mean of its divisors is an integer number (14149082).

Almost surely, 2^42447243 is an apocalyptic number.

42447243 is a deficient number, since it is larger than the sum of its proper divisors (14149085).

42447243 is a wasteful number, since it uses less digits than its factorization.

42447243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14149084.

The product of its digits is 21504, while the sum is 30.

The square root of 42447243 is about 6515.1548715284. The cubic root of 42447243 is about 348.8321428791.

The spelling of 42447243 in words is "forty-two million, four hundred forty-seven thousand, two hundred forty-three".