42857687 has 4 divisors (see below), whose sum is σ = 43061016. Its totient is φ = 42654360.

The previous prime is 42857681. The next prime is 42857693. The reversal of 42857687 is 78675824.

42857687 is nontrivially palindromic in base 14.

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

It is an interprime number because it is at equal distance from previous prime (42857681) and next prime (42857693).

It is a cyclic number.

It is not a de Polignac number, because 42857687 - 2¹⁴ = 42841303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42857681) 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, 101348 + ... + 101769.

It is an arithmetic number, because the mean of its divisors is an integer number (10765254).

Almost surely, 2^42857687 is an apocalyptic number.

42857687 is a deficient number, since it is larger than the sum of its proper divisors (203329).

42857687 is a wasteful number, since it uses less digits than its factorization.

42857687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203328.

The product of its digits is 752640, while the sum is 47.

The square root of 42857687 is about 6546.5782665451. The cubic root of 42857687 is about 349.9528834534.

The spelling of 42857687 in words is "forty-two million, eight hundred fifty-seven thousand, six hundred eighty-seven".