42113889 has 6 divisors (see below), whose sum is σ = 60831186. Its totient is φ = 28075920.

The previous prime is 42113849. The next prime is 42113917. The reversal of 42113889 is 98831124.

It can be written as a sum of positive squares in only one way, i.e., 33732864 + 8381025 = 5808^2 + 2895^2 .

It is not a de Polignac number, because 42113889 - 2⁷ = 42113761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42113849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2339652 + ... + 2339669.

It is an arithmetic number, because the mean of its divisors is an integer number (10138531).

Almost surely, 2^42113889 is an apocalyptic number.

It is an amenable number.

42113889 is a deficient number, since it is larger than the sum of its proper divisors (18717297).

42113889 is a wasteful number, since it uses less digits than its factorization.

42113889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4679327 (or 4679324 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 42113889 is about 6489.5214769658. The cubic root of 42113889 is about 347.9165723515.

It can be divided in two parts, 4211 and 3889, that added together give a square (8100 = 90²).

The spelling of 42113889 in words is "forty-two million, one hundred thirteen thousand, eight hundred eighty-nine".