42168787 has 8 divisors (see below), whose sum is σ = 43479072. Its totient is φ = 40872000.

The previous prime is 42168719. The next prime is 42168803. The reversal of 42168787 is 78786124.

42168787 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 a de Polignac number, because none of the positive numbers 2^k-42168787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42168187) 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, 3162 + ... + 9712.

It is an arithmetic number, because the mean of its divisors is an integer number (5434884).

Almost surely, 2^42168787 is an apocalyptic number.

42168787 is a deficient number, since it is larger than the sum of its proper divisors (1310285).

42168787 is a wasteful number, since it uses less digits than its factorization.

42168787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6749.

The product of its digits is 150528, while the sum is 43.

The square root of 42168787 is about 6493.7498411935. The cubic root of 42168787 is about 348.0676834706.

The spelling of 42168787 in words is "forty-two million, one hundred sixty-eight thousand, seven hundred eighty-seven".