42831291 has 8 divisors (see below), whose sum is σ = 57961024. Its totient is φ = 28127880.

The previous prime is 42831253. The next prime is 42831293. The reversal of 42831291 is 19213824.

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

It is not a de Polignac number, because 42831291 - 2¹⁷ = 42700219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42831293) 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, 106345 + ... + 106746.

It is an arithmetic number, because the mean of its divisors is an integer number (7245128).

Almost surely, 2^42831291 is an apocalyptic number.

42831291 is a deficient number, since it is larger than the sum of its proper divisors (15129733).

42831291 is a wasteful number, since it uses less digits than its factorization.

42831291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213161.

The product of its digits is 3456, while the sum is 30.

The square root of 42831291 is about 6544.5619410317. The cubic root of 42831291 is about 349.8810235061.

The spelling of 42831291 in words is "forty-two million, eight hundred thirty-one thousand, two hundred ninety-one".