42911289 has 20 divisors (see below), whose sum is σ = 65067024. Its totient is φ = 28176984.

The previous prime is 42911287. The next prime is 42911293. The reversal of 42911289 is 98211924.

42911289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42911289 - 2¹ = 42911287 is a prime.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (42911287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1474 + ... + 9380.

Almost surely, 2^42911289 is an apocalyptic number.

It is an amenable number.

42911289 is a deficient number, since it is larger than the sum of its proper divisors (22155735).

42911289 is an equidigital number, since it uses as much as digits as its factorization.

42911289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7986 (or 7977 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 42911289 is about 6550.6708816731. The cubic root of 42911289 is about 350.0987177322.

It can be divided in two parts, 429112 and 89, that added together give a triangular number (429201 = T₉₂₆).

The spelling of 42911289 in words is "forty-two million, nine hundred eleven thousand, two hundred eighty-nine".