42568391 has 8 divisors (see below), whose sum is σ = 45248544. Its totient is φ = 39907840.

The previous prime is 42568327. The next prime is 42568397. The reversal of 42568391 is 19386524.

It is a happy number.

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

It is not a de Polignac number, because 42568391 - 2⁶ = 42568327 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 (42568397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290 + ... + 9231.

It is an arithmetic number, because the mean of its divisors is an integer number (5656068).

Almost surely, 2^42568391 is an apocalyptic number.

42568391 is a deficient number, since it is larger than the sum of its proper divisors (2680153).

42568391 is a wasteful number, since it uses less digits than its factorization.

42568391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9801.

The product of its digits is 51840, while the sum is 38.

The square root of 42568391 is about 6524.4456469496. The cubic root of 42568391 is about 349.1636930753.

The spelling of 42568391 in words is "forty-two million, five hundred sixty-eight thousand, three hundred ninety-one".