42790871 has 8 divisors (see below), whose sum is σ = 43970640. Its totient is φ = 41626368.

The previous prime is 42790843. The next prime is 42790883. The reversal of 42790871 is 17809724.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42790871 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 (42790841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1985 + ... + 9461.

It is an arithmetic number, because the mean of its divisors is an integer number (5496330).

Almost surely, 2^42790871 is an apocalyptic number.

42790871 is a deficient number, since it is larger than the sum of its proper divisors (1179769).

42790871 is an equidigital number, since it uses as much as digits as its factorization.

42790871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7633.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 42790871 is about 6541.4731521271. The cubic root of 42790871 is about 349.7709276576.

The spelling of 42790871 in words is "forty-two million, seven hundred ninety thousand, eight hundred seventy-one".