42013887 has 4 divisors (see below), whose sum is σ = 56018520. Its totient is φ = 28009256.

The previous prime is 42013877. The next prime is 42013949. The reversal of 42013887 is 78831024.

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 42013887 - 2⁶ = 42013823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42013877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7002312 + ... + 7002317.

It is an arithmetic number, because the mean of its divisors is an integer number (14004630).

Almost surely, 2^42013887 is an apocalyptic number.

42013887 is a deficient number, since it is larger than the sum of its proper divisors (14004633).

42013887 is a wasteful number, since it uses less digits than its factorization.

42013887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14004632.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 42013887 is about 6481.8120151698. The cubic root of 42013887 is about 347.6409710464.

The spelling of 42013887 in words is "forty-two million, thirteen thousand, eight hundred eighty-seven".