42858891 has 6 divisors (see below), whose sum is σ = 61907300. Its totient is φ = 28572588.

The previous prime is 42858883. The next prime is 42858901. The reversal of 42858891 is 19885824.

It is a happy number.

It is not a de Polignac number, because 42858891 - 2³ = 42858883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42858841) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2381041 + ... + 2381058.

Almost surely, 2^42858891 is an apocalyptic number.

42858891 is a deficient number, since it is larger than the sum of its proper divisors (19048409).

42858891 is a wasteful number, since it uses less digits than its factorization.

42858891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4762105 (or 4762102 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 42858891 is about 6546.6702223344. The cubic root of 42858891 is about 349.9561604955.

It can be divided in two parts, 428 and 58891, that added together give a cube (59319 = 39³).

The spelling of 42858891 in words is "forty-two million, eight hundred fifty-eight thousand, eight hundred ninety-one".