42864191 has 12 divisors (see below), whose sum is σ = 46197360. Its totient is φ = 39755520.

The previous prime is 42864187. The next prime is 42864193. The reversal of 42864191 is 19146824.

It is a happy number.

It is not a de Polignac number, because 42864191 - 2² = 42864187 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42864193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19475 + ... + 21563.

It is an arithmetic number, because the mean of its divisors is an integer number (3849780).

Almost surely, 2^42864191 is an apocalyptic number.

42864191 is a deficient number, since it is larger than the sum of its proper divisors (3333169).

42864191 is a wasteful number, since it uses less digits than its factorization.

42864191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194 (or 2177 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 42864191 is about 6547.0749957519. The cubic root of 42864191 is about 349.9705852831.

The spelling of 42864191 in words is "forty-two million, eight hundred sixty-four thousand, one hundred ninety-one".