42388247 has 8 divisors (see below), whose sum is σ = 46667280. Its totient is φ = 38180160.

The previous prime is 42388243. The next prime is 42388249. The reversal of 42388247 is 74288324.

It is a happy number.

42388247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42388247 - 2² = 42388243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42388247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42388243) 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 7 ways as a sum of consecutive naturals, for example, 16478 + ... + 18875.

It is an arithmetic number, because the mean of its divisors is an integer number (5833410).

Almost surely, 2^42388247 is an apocalyptic number.

42388247 is a deficient number, since it is larger than the sum of its proper divisors (4279033).

42388247 is a wasteful number, since it uses less digits than its factorization.

42388247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35473.

The product of its digits is 86016, while the sum is 38.

The square root of 42388247 is about 6510.6256995776. The cubic root of 42388247 is about 348.6704579155.

The spelling of 42388247 in words is "forty-two million, three hundred eighty-eight thousand, two hundred forty-seven".