42387243 has 4 divisors (see below), whose sum is σ = 56516328. Its totient is φ = 28258160.

The previous prime is 42387217. The next prime is 42387287. The reversal of 42387243 is 34278324.

42387243 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 a cyclic number.

It is not a de Polignac number, because 42387243 - 2⁵ = 42387211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42387743) 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, 7064538 + ... + 7064543.

It is an arithmetic number, because the mean of its divisors is an integer number (14129082).

Almost surely, 2^42387243 is an apocalyptic number.

42387243 is a deficient number, since it is larger than the sum of its proper divisors (14129085).

42387243 is a wasteful number, since it uses less digits than its factorization.

42387243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14129084.

The product of its digits is 32256, while the sum is 33.

The square root of 42387243 is about 6510.5485943966. The cubic root of 42387243 is about 348.6677050463.

The spelling of 42387243 in words is "forty-two million, three hundred eighty-seven thousand, two hundred forty-three".