42113887 has 4 divisors (see below), whose sum is σ = 43566120. Its totient is φ = 40661656.

The previous prime is 42113849. The next prime is 42113917. The reversal of 42113887 is 78831124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42113887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42113087) 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, 726073 + ... + 726130.

It is an arithmetic number, because the mean of its divisors is an integer number (10891530).

Almost surely, 2^42113887 is an apocalyptic number.

42113887 is a deficient number, since it is larger than the sum of its proper divisors (1452233).

42113887 is a wasteful number, since it uses less digits than its factorization.

42113887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452232.

The product of its digits is 10752, while the sum is 34.

The square root of 42113887 is about 6489.5213228712. The cubic root of 42113887 is about 347.9165668439.

It can be divided in two parts, 4 and 2113887, that multiplied together give a palindrome (8455548).

The spelling of 42113887 in words is "forty-two million, one hundred thirteen thousand, eight hundred eighty-seven".