42868187 has 4 divisors (see below), whose sum is σ = 42893016. Its totient is φ = 42843360.

The previous prime is 42868171. The next prime is 42868193. The reversal of 42868187 is 78186824.

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 42868187 - 2⁴ = 42868171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42868117) 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, 9614 + ... + 13347.

It is an arithmetic number, because the mean of its divisors is an integer number (10723254).

Almost surely, 2^42868187 is an apocalyptic number.

42868187 is a deficient number, since it is larger than the sum of its proper divisors (24829).

42868187 is a wasteful number, since it uses less digits than its factorization.

42868187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24828.

The product of its digits is 172032, while the sum is 44.

The square root of 42868187 is about 6547.3801630881. The cubic root of 42868187 is about 349.9814602424.

The spelling of 42868187 in words is "forty-two million, eight hundred sixty-eight thousand, one hundred eighty-seven".