42387815 has 8 divisors (see below), whose sum is σ = 51562608. Its totient is φ = 33445440.

The previous prime is 42387799. The next prime is 42387833. The reversal of 42387815 is 51878324.

42387815 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 not a de Polignac number, because 42387815 - 2⁴ = 42387799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 57701 + ... + 58430.

It is an arithmetic number, because the mean of its divisors is an integer number (6445326).

Almost surely, 2^42387815 is an apocalyptic number.

42387815 is a deficient number, since it is larger than the sum of its proper divisors (9174793).

42387815 is a wasteful number, since it uses less digits than its factorization.

42387815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116209.

The product of its digits is 53760, while the sum is 38.

The square root of 42387815 is about 6510.5925229583. The cubic root of 42387815 is about 348.6692734193.

The spelling of 42387815 in words is "forty-two million, three hundred eighty-seven thousand, eight hundred fifteen".