42878113 has 8 divisors (see below), whose sum is σ = 43973928. Its totient is φ = 41793024.

The previous prime is 42878089. The next prime is 42878149. The reversal of 42878113 is 31187824.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8690704 + 34187409 = 2948^2 + 5847^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42878113 - 2⁵ = 42878081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42878513) 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, 5745 + ... + 10897.

It is an arithmetic number, because the mean of its divisors is an integer number (5496741).

Almost surely, 2^42878113 is an apocalyptic number.

It is an amenable number.

42878113 is a deficient number, since it is larger than the sum of its proper divisors (1095815).

42878113 is a wasteful number, since it uses less digits than its factorization.

42878113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5363.

The product of its digits is 10752, while the sum is 34.

The square root of 42878113 is about 6548.1381323243. The cubic root of 42878113 is about 350.0084705433.

The spelling of 42878113 in words is "forty-two million, eight hundred seventy-eight thousand, one hundred thirteen".