42687865 has 8 divisors (see below), whose sum is σ = 55882368. Its totient is φ = 31045680.

The previous prime is 42687859. The next prime is 42687877. The reversal of 42687865 is 56878624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42687865 - 2⁹ = 42687353 is a prime.

It is a super-3 number, since 3×42687865³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388017 + ... + 388126.

It is an arithmetic number, because the mean of its divisors is an integer number (6985296).

Almost surely, 2^42687865 is an apocalyptic number.

It is an amenable number.

42687865 is a deficient number, since it is larger than the sum of its proper divisors (13194503).

42687865 is a wasteful number, since it uses less digits than its factorization.

42687865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776159.

The product of its digits is 645120, while the sum is 46.

The square root of 42687865 is about 6533.5951053000. The cubic root of 42687865 is about 349.4900464691.

The spelling of 42687865 in words is "forty-two million, six hundred eighty-seven thousand, eight hundred sixty-five".